99991502 has 16 divisors (see below), whose sum is σ = 161936880. Its totient is φ = 46032192.

The previous prime is 99991499. The next prime is 99991517. The reversal of 99991502 is 20519999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5933 + ... + 15335.

It is an arithmetic number, because the mean of its divisors is an integer number (10121055).

Almost surely, 2^99991502 is an apocalyptic number.

99991502 is a deficient number, since it is larger than the sum of its proper divisors (61945378).

99991502 is a wasteful number, since it uses less digits than its factorization.

99991502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827.

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 99991502 is about 9999.5750909726. The cubic root of 99991502 is about 464.1457349148.

The spelling of 99991502 in words is "ninety-nine million, nine hundred ninety-one thousand, five hundred two".