99971316 has 18 divisors (see below), whose sum is σ = 252705362. Its totient is φ = 33323760.

The previous prime is 99971309. The next prime is 99971327. The reversal of 99971316 is 61317999.

It can be written as a sum of positive squares in only one way, i.e., 96943716 + 3027600 = 9846^2 + 1740^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1388455 + ... + 1388526.

Almost surely, 2^99971316 is an apocalyptic number.

It is an amenable number.

99971316 is an abundant number, since it is smaller than the sum of its proper divisors (152734046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99971316 is a wasteful number, since it uses less digits than its factorization.

99971316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776991 (or 2776986 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 99971316 is about 9998.5656971388. The cubic root of 99971316 is about 464.1144993393.

The spelling of 99971316 in words is "ninety-nine million, nine hundred seventy-one thousand, three hundred sixteen".