97813911 has 8 divisors (see below), whose sum is σ = 140450800. Its totient is φ = 60193152.

The previous prime is 97813907. The next prime is 97813939. The reversal of 97813911 is 11931879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97813911 - 2² = 97813907 is a prime.

It is a super-2 number, since 2×97813911² = 19135122370231842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2508049 = 97813911 / (9 + 7 + 8 + 1 + 3 + 9 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97813911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97813951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253986 + ... + 1254063.

It is an arithmetic number, because the mean of its divisors is an integer number (17556350).

Almost surely, 2^97813911 is an apocalyptic number.

97813911 is a deficient number, since it is larger than the sum of its proper divisors (42636889).

97813911 is a wasteful number, since it uses less digits than its factorization.

97813911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508065.

The product of its digits is 13608, while the sum is 39.

The square root of 97813911 is about 9890.0915567046. The cubic root of 97813911 is about 460.7516240704.

The spelling of 97813911 in words is "ninety-seven million, eight hundred thirteen thousand, nine hundred eleven".