97897399 has 4 divisors (see below), whose sum is σ = 97933464. Its totient is φ = 97861336.

The previous prime is 97897391. The next prime is 97897447. The reversal of 97897399 is 99379879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99379879 = 2699 ⋅36821.

It is a cyclic number.

It is not a de Polignac number, because 97897399 - 2³ = 97897391 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 (97897391) 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, 13597 + ... + 19510.

It is an arithmetic number, because the mean of its divisors is an integer number (24483366).

Almost surely, 2^97897399 is an apocalyptic number.

97897399 is a deficient number, since it is larger than the sum of its proper divisors (36065).

97897399 is a wasteful number, since it uses less digits than its factorization.

97897399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36064.

The product of its digits is 7715736, while the sum is 61.

The square root of 97897399 is about 9894.3114464828. The cubic root of 97897399 is about 460.8826766373.

The spelling of 97897399 in words is "ninety-seven million, eight hundred ninety-seven thousand, three hundred ninety-nine".