97439019449 has 2 divisors, whose sum is σ = 97439019450. Its totient is φ = 97439019448.

The previous prime is 97439019443. The next prime is 97439019451. The reversal of 97439019449 is 94491093479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66994004224 + 30445015225 = 258832^2 + 174485^2 .

It is a cyclic number.

It is not a de Polignac number, because 97439019449 - 2⁸ = 97439019193 is a prime.

It is a super-2 number, since 2×97439019449² (a number of 23 digits) contains 22 as substring.

Together with 97439019451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97439019443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48719509724 + 48719509725.

It is an arithmetic number, because the mean of its divisors is an integer number (48719509725).

Almost surely, 2^97439019449 is an apocalyptic number.

It is an amenable number.

97439019449 is a deficient number, since it is larger than the sum of its proper divisors (1).

97439019449 is an equidigital number, since it uses as much as digits as its factorization.

97439019449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 97439019449 in words is "ninety-seven billion, four hundred thirty-nine million, nineteen thousand, four hundred forty-nine".