97239291 has 16 divisors (see below), whose sum is σ = 134676000. Its totient is φ = 62332928.

The previous prime is 97239277. The next prime is 97239347. The reversal of 97239291 is 19293279.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 97239291 - 2¹¹ = 97237243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97239271) 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, 20185 + ... + 24533.

It is an arithmetic number, because the mean of its divisors is an integer number (8417250).

Almost surely, 2^97239291 is an apocalyptic number.

97239291 is a deficient number, since it is larger than the sum of its proper divisors (37436709).

97239291 is a wasteful number, since it uses less digits than its factorization.

97239291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638.

The product of its digits is 61236, while the sum is 42.

The square root of 97239291 is about 9860.9984788560. The cubic root of 97239291 is about 459.8476038967.

The spelling of 97239291 in words is "ninety-seven million, two hundred thirty-nine thousand, two hundred ninety-one".