97431287 has 2 divisors, whose sum is σ = 97431288. Its totient is φ = 97431286.

The previous prime is 97431283. The next prime is 97431317. The reversal of 97431287 is 78213479.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97431287 - 2² = 97431283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97431283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48715643 + 48715644.

It is an arithmetic number, because the mean of its divisors is an integer number (48715644).

Almost surely, 2^97431287 is an apocalyptic number.

97431287 is a deficient number, since it is larger than the sum of its proper divisors (1).

97431287 is an equidigital number, since it uses as much as digits as its factorization.

97431287 is an odious number, because the sum of its binary digits is odd.

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

The square root of 97431287 is about 9870.7287978143. The cubic root of 97431287 is about 460.1500565898.

The spelling of 97431287 in words is "ninety-seven million, four hundred thirty-one thousand, two hundred eighty-seven".