99971277 has 16 divisors (see below), whose sum is σ = 153764352. Its totient is φ = 56591280.

The previous prime is 99971257. The next prime is 99971281. The reversal of 99971277 is 77217999.

It is not a de Polignac number, because 99971277 - 2¹⁰ = 99970253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99971257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19999 + ... + 24492.

It is an arithmetic number, because the mean of its divisors is an integer number (9610272).

Almost surely, 2^99971277 is an apocalyptic number.

It is an amenable number.

99971277 is a deficient number, since it is larger than the sum of its proper divisors (53793075).

99971277 is a wasteful number, since it uses less digits than its factorization.

99971277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44608.

The product of its digits is 500094, while the sum is 51.

The square root of 99971277 is about 9998.5637468588. The cubic root of 99971277 is about 464.1144389871.

The spelling of 99971277 in words is "ninety-nine million, nine hundred seventy-one thousand, two hundred seventy-seven".