97881955 has 4 divisors (see below), whose sum is σ = 117458352. Its totient is φ = 78305560.

The previous prime is 97881943. The next prime is 97881967. The reversal of 97881955 is 55918879.

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

It is an interprime number because it is at equal distance from previous prime (97881943) and next prime (97881967).

It is not a de Polignac number, because 97881955 - 2⁵ = 97881923 is a prime.

It is a super-2 number, since 2×97881955² = 19161754229244050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9788191 + ... + 9788200.

It is an arithmetic number, because the mean of its divisors is an integer number (29364588).

Almost surely, 2^97881955 is an apocalyptic number.

97881955 is a deficient number, since it is larger than the sum of its proper divisors (19576397).

97881955 is a wasteful number, since it uses less digits than its factorization.

97881955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19576396.

The product of its digits is 907200, while the sum is 52.

The square root of 97881955 is about 9893.5309672533. The cubic root of 97881955 is about 460.8584395399.

The spelling of 97881955 in words is "ninety-seven million, eight hundred eighty-one thousand, nine hundred fifty-five".