97003021991 has 2 divisors, whose sum is σ = 97003021992. Its totient is φ = 97003021990.

The previous prime is 97003021981. The next prime is 97003022093. The reversal of 97003021991 is 19912030079.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97003021991 - 2¹⁰ = 97003020967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97003021931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48501510995 + 48501510996.

It is an arithmetic number, because the mean of its divisors is an integer number (48501510996).

Almost surely, 2^97003021991 is an apocalyptic number.

97003021991 is a deficient number, since it is larger than the sum of its proper divisors (1).

97003021991 is an equidigital number, since it uses as much as digits as its factorization.

97003021991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The spelling of 97003021991 in words is "ninety-seven billion, three million, twenty-one thousand, nine hundred ninety-one".