97999901 has 4 divisors (see below), whose sum is σ = 98134332. Its totient is φ = 97865472.

The previous prime is 97999879. The next prime is 97999919. The reversal of 97999901 is 10999979.

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 54096025 + 43903876 = 7355^2 + 6626^2 .

It is a cyclic number.

It is not a de Polignac number, because 97999901 - 2¹⁴ = 97983517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97990901) 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, 66116 + ... + 67581.

It is an arithmetic number, because the mean of its divisors is an integer number (24533583).

Almost surely, 2^97999901 is an apocalyptic number.

It is an amenable number.

97999901 is a deficient number, since it is larger than the sum of its proper divisors (134431).

97999901 is a wasteful number, since it uses less digits than its factorization.

97999901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134430.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 97999901 is about 9899.4899363553. The cubic root of 97999901 is about 461.0434739564.

The spelling of 97999901 in words is "ninety-seven million, nine hundred ninety-nine thousand, nine hundred one".