97331504891 has 2 divisors, whose sum is σ = 97331504892. Its totient is φ = 97331504890.

The previous prime is 97331504873. The next prime is 97331504927. The reversal of 97331504891 is 19840513379.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97331504891 - 2¹⁸ = 97331242747 is a prime.

It is not a weakly prime, because it can be changed into another prime (97331504821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48665752445 + 48665752446.

It is an arithmetic number, because the mean of its divisors is an integer number (48665752446).

Almost surely, 2^97331504891 is an apocalyptic number.

97331504891 is a deficient number, since it is larger than the sum of its proper divisors (1).

97331504891 is an equidigital number, since it uses as much as digits as its factorization.

97331504891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 97331504891 in words is "ninety-seven billion, three hundred thirty-one million, five hundred four thousand, eight hundred ninety-one".