699121056 has 144 divisors (see below), whose sum is σ = 1975567104. Its totient is φ = 216416256.

The previous prime is 699121051. The next prime is 699121057. The reversal of 699121056 is 650121996.

It is not an unprimeable number, because it can be changed into a prime (699121051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3134961 + ... + 3135183.

It is an arithmetic number, because the mean of its divisors is an integer number (13719216).

Almost surely, 2^699121056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699121056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987783552).

699121056 is an abundant number, since it is smaller than the sum of its proper divisors (1276446048).

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

699121056 is a wasteful number, since it uses less digits than its factorization.

699121056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 699121056 is about 26440.8974129094. The cubic root of 699121056 is about 887.5322185222.

The spelling of 699121056 in words is "six hundred ninety-nine million, one hundred twenty-one thousand, fifty-six".