97892642909 has 2 divisors, whose sum is σ = 97892642910. Its totient is φ = 97892642908.

The previous prime is 97892642879. The next prime is 97892642923. The reversal of 97892642909 is 90924629879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97892642884 + 25 = 312878^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 97892642909 - 2²⁴ = 97875865693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97892642009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48946321454 + 48946321455.

It is an arithmetic number, because the mean of its divisors is an integer number (48946321455).

Almost surely, 2^97892642909 is an apocalyptic number.

It is an amenable number.

97892642909 is a deficient number, since it is larger than the sum of its proper divisors (1).

97892642909 is an equidigital number, since it uses as much as digits as its factorization.

97892642909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35271936, while the sum is 65.

The spelling of 97892642909 in words is "ninety-seven billion, eight hundred ninety-two million, six hundred forty-two thousand, nine hundred nine".