709097688 has 48 divisors (see below), whose sum is σ = 2068204320. Its totient is φ = 218183616.

The previous prime is 709097681. The next prime is 709097699. The reversal of 709097688 is 886790907.

709097688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×709097688² = 1005639062253890688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709097681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377856 + ... + 379727.

It is an arithmetic number, because the mean of its divisors is an integer number (43087590).

Almost surely, 2^709097688 is an apocalyptic number.

709097688 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

709097688 is an abundant number, since it is smaller than the sum of its proper divisors (1359106632).

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

709097688 is a wasteful number, since it uses less digits than its factorization.

709097688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757608 (or 757601 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 709097688 is about 26628.8882231309. Note that the first 3 decimals coincide. The cubic root of 709097688 is about 891.7340631077.

The spelling of 709097688 in words is "seven hundred nine million, ninety-seven thousand, six hundred eighty-eight".