696991620 has 96 divisors (see below), whose sum is σ = 2133226368. Its totient is φ = 168993792.

The previous prime is 696991613. The next prime is 696991727. The reversal of 696991620 is 26199696.

It is a happy number.

696991620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 696991620.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45592 + ... + 58928.

It is an arithmetic number, because the mean of its divisors is an integer number (22221108).

Almost surely, 2^696991620 is an apocalyptic number.

696991620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 696991620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066613184).

696991620 is an abundant number, since it is smaller than the sum of its proper divisors (1436234748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

696991620 is a wasteful number, since it uses less digits than its factorization.

696991620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13429 (or 13427 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 696991620 is about 26400.5988568441. The cubic root of 696991620 is about 886.6301977450.

It can be divided in two parts, 6969 and 91620, that added together give a palindrome (98589).

The spelling of 696991620 in words is "six hundred ninety-six million, nine hundred ninety-one thousand, six hundred twenty".