97990011111001 has 4 divisors (see below), whose sum is σ = 97990398472932. Its totient is φ = 97989623749072.

The previous prime is 97990011110983. The next prime is 97990011111011. The reversal of 97990011111001 is 10011111009979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65548454440000 + 32441556671001 = 8096200^2 + 5695749^2 .

It is a cyclic number.

It is not a de Polignac number, because 97990011111001 - 2¹¹ = 97990011108953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97990011111011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193301266 + ... + 193807531.

It is an arithmetic number, because the mean of its divisors is an integer number (24497599618233).

Almost surely, 2^{97990011111001} is an apocalyptic number.

It is an amenable number.

97990011111001 is a deficient number, since it is larger than the sum of its proper divisors (387361931).

97990011111001 is a wasteful number, since it uses less digits than its factorization.

97990011111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387361930.

The product of its (nonzero) digits is 5103, while the sum is 40.

The spelling of 97990011111001 in words is "ninety-seven trillion, nine hundred ninety billion, eleven million, one hundred eleven thousand, one".