97905789 has 12 divisors (see below), whose sum is σ = 141513372. Its totient is φ = 65227200.

The previous prime is 97905763. The next prime is 97905791. The reversal of 97905789 is 98750979.

It can be written as a sum of positive squares in 2 ways, for example, as 56881764 + 41024025 = 7542^2 + 6405^2 .

It is not a de Polignac number, because 97905789 - 2⁵ = 97905757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97905289) 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, 16729 + ... + 21809.

It is an arithmetic number, because the mean of its divisors is an integer number (11792781).

Almost surely, 2^97905789 is an apocalyptic number.

It is an amenable number.

97905789 is a deficient number, since it is larger than the sum of its proper divisors (43607583).

97905789 is a wasteful number, since it uses less digits than its factorization.

97905789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 54.

The square root of 97905789 is about 9894.7354183930. The cubic root of 97905789 is about 460.8958424458.

The spelling of 97905789 in words is "ninety-seven million, nine hundred five thousand, seven hundred eighty-nine".