97979182409 has 2 divisors, whose sum is σ = 97979182410. Its totient is φ = 97979182408.

The previous prime is 97979182403. The next prime is 97979182417. The reversal of 97979182409 is 90428197979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74557940809 + 23421241600 = 273053^2 + 153040^2 .

It is a cyclic number.

It is not a de Polignac number, because 97979182409 - 2¹² = 97979178313 is a prime.

It is not a weakly prime, because it can be changed into another prime (97979182403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48989591204 + 48989591205.

It is an arithmetic number, because the mean of its divisors is an integer number (48989591205).

Almost surely, 2^97979182409 is an apocalyptic number.

It is an amenable number.

97979182409 is a deficient number, since it is larger than the sum of its proper divisors (1).

97979182409 is an equidigital number, since it uses as much as digits as its factorization.

97979182409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 97979182409 in words is "ninety-seven billion, nine hundred seventy-nine million, one hundred eighty-two thousand, four hundred nine".