99077971 has 4 divisors (see below), whose sum is σ = 101755792. Its totient is φ = 96400152.

The previous prime is 99077939. The next prime is 99077987. The reversal of 99077971 is 17977099.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99077971 - 2⁵ = 99077939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99087971) 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, 1338855 + ... + 1338928.

It is an arithmetic number, because the mean of its divisors is an integer number (25438948).

Almost surely, 2^99077971 is an apocalyptic number.

99077971 is a deficient number, since it is larger than the sum of its proper divisors (2677821).

99077971 is a wasteful number, since it uses less digits than its factorization.

99077971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677820.

The product of its (nonzero) digits is 250047, while the sum is 49.

The square root of 99077971 is about 9953.7917900667. The cubic root of 99077971 is about 462.7279164949.

It can be divided in two parts, 990 and 77971, that added together give a square (78961 = 281²).

The spelling of 99077971 in words is "ninety-nine million, seventy-seven thousand, nine hundred seventy-one".