699561492 has 72 divisors (see below), whose sum is σ = 1981756224. Its totient is φ = 188110848.

The previous prime is 699561463. The next prime is 699561493. The reversal of 699561492 is 294165996.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699561493) 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, 9868 + ... + 38684.

It is an arithmetic number, because the mean of its divisors is an integer number (27524392).

Almost surely, 2^699561492 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 699561492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990878112).

699561492 is an abundant number, since it is smaller than the sum of its proper divisors (1282194732).

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

699561492 is a wasteful number, since it uses less digits than its factorization.

699561492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28865 (or 28846 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The square root of 699561492 is about 26449.2247901522. The cubic root of 699561492 is about 887.7185568196.

The spelling of 699561492 in words is "six hundred ninety-nine million, five hundred sixty-one thousand, four hundred ninety-two".