99981436 has 6 divisors (see below), whose sum is σ = 174967520. Its totient is φ = 49990716.

The previous prime is 99981421. The next prime is 99981451. The reversal of 99981436 is 63418999.

It is an interprime number because it is at equal distance from previous prime (99981421) and next prime (99981451).

It is a self number, because there is not a number n which added to its sum of digits gives 99981436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12497676 + ... + 12497683.

Almost surely, 2^99981436 is an apocalyptic number.

It is an amenable number.

99981436 is a deficient number, since it is larger than the sum of its proper divisors (74986084).

99981436 is a wasteful number, since it uses less digits than its factorization.

99981436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24995363 (or 24995361 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 99981436 is about 9999.0717569182. The cubic root of 99981436 is about 464.1301594321.

The spelling of 99981436 in words is "ninety-nine million, nine hundred eighty-one thousand, four hundred thirty-six".