97957509 has 16 divisors (see below), whose sum is σ = 140865984. Its totient is φ = 60192000.

The previous prime is 97957507. The next prime is 97957511. The reversal of 97957509 is 90575979.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (97957507) and next prime (97957511).

It is not a de Polignac number, because 97957509 - 2¹ = 97957507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97957501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32934 + ... + 35784.

It is an arithmetic number, because the mean of its divisors is an integer number (8804124).

Almost surely, 2^97957509 is an apocalyptic number.

It is an amenable number.

97957509 is a deficient number, since it is larger than the sum of its proper divisors (42908475).

97957509 is a wasteful number, since it uses less digits than its factorization.

97957509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748.

The product of its (nonzero) digits is 893025, while the sum is 51.

The square root of 97957509 is about 9897.3485843432. The cubic root of 97957509 is about 460.9769862234.

The spelling of 97957509 in words is "ninety-seven million, nine hundred fifty-seven thousand, five hundred nine".