97427731 has 16 divisors (see below), whose sum is σ = 105092640. Its totient is φ = 89996800.

The previous prime is 97427717. The next prime is 97427753. The reversal of 97427731 is 13772479.

It is a cyclic number.

It is not a de Polignac number, because 97427731 - 2¹¹ = 97425683 is a prime.

It is a super-2 number, since 2×97427731² = 18984325535616722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97497731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307185 + ... + 307501.

It is an arithmetic number, because the mean of its divisors is an integer number (6568290).

Almost surely, 2^97427731 is an apocalyptic number.

97427731 is a deficient number, since it is larger than the sum of its proper divisors (7664909).

97427731 is a wasteful number, since it uses less digits than its factorization.

97427731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its digits is 74088, while the sum is 40.

The square root of 97427731 is about 9870.5486676273. The cubic root of 97427731 is about 460.1444584102.

The spelling of 97427731 in words is "ninety-seven million, four hundred twenty-seven thousand, seven hundred thirty-one".