97381895531 has 2 divisors, whose sum is σ = 97381895532. Its totient is φ = 97381895530.

The previous prime is 97381895453. The next prime is 97381895563. The reversal of 97381895531 is 13559818379.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97381895531 - 2¹⁰ = 97381894507 is a prime.

It is a super-2 number, since 2×97381895531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97381895131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48690947765 + 48690947766.

It is an arithmetic number, because the mean of its divisors is an integer number (48690947766).

Almost surely, 2^97381895531 is an apocalyptic number.

97381895531 is a deficient number, since it is larger than the sum of its proper divisors (1).

97381895531 is an equidigital number, since it uses as much as digits as its factorization.

97381895531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 59.

The spelling of 97381895531 in words is "ninety-seven billion, three hundred eighty-one million, eight hundred ninety-five thousand, five hundred thirty-one".