97442731 has 2 divisors, whose sum is σ = 97442732. Its totient is φ = 97442730.

The previous prime is 97442713. The next prime is 97442777. The reversal of 97442731 is 13724479.

Together with previous prime (97442713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97442731 - 2⁵ = 97442699 is a prime.

It is a super-4 number, since 4×97442731⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (97442791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48721365 + 48721366.

It is an arithmetic number, because the mean of its divisors is an integer number (48721366).

Almost surely, 2^97442731 is an apocalyptic number.

97442731 is a deficient number, since it is larger than the sum of its proper divisors (1).

97442731 is an equidigital number, since it uses as much as digits as its factorization.

97442731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 97442731 is about 9871.3084745640. The cubic root of 97442731 is about 460.1680718538.

The spelling of 97442731 in words is "ninety-seven million, four hundred forty-two thousand, seven hundred thirty-one".