97287431 has 4 divisors (see below), whose sum is σ = 100642200. Its totient is φ = 93932664.

The previous prime is 97287419. The next prime is 97287451. The reversal of 97287431 is 13478279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13478279 = 953 ⋅14143.

It is a cyclic number.

It is not a de Polignac number, because 97287431 - 2⁶ = 97287367 is a prime.

It is a super-2 number, since 2×97287431² = 18929688461159522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97287451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677341 + ... + 1677398.

It is an arithmetic number, because the mean of its divisors is an integer number (25160550).

Almost surely, 2^97287431 is an apocalyptic number.

97287431 is a deficient number, since it is larger than the sum of its proper divisors (3354769).

97287431 is a wasteful number, since it uses less digits than its factorization.

97287431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354768.

The product of its digits is 84672, while the sum is 41.

The square root of 97287431 is about 9863.4391061130. The cubic root of 97287431 is about 459.9234765586.

The spelling of 97287431 in words is "ninety-seven million, two hundred eighty-seven thousand, four hundred thirty-one".