99940477 has 16 divisors (see below), whose sum is σ = 124104960. Its totient is φ = 78365952.

The previous prime is 99940429. The next prime is 99940499. The reversal of 99940477 is 77404999.

It is a de Polignac number, because none of the positive numbers 2^k-99940477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99940477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99940877) 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, 5424 + ... + 15142.

It is an arithmetic number, because the mean of its divisors is an integer number (7756560).

Almost surely, 2^99940477 is an apocalyptic number.

It is an amenable number.

99940477 is a deficient number, since it is larger than the sum of its proper divisors (24164483).

99940477 is a wasteful number, since it uses less digits than its factorization.

99940477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9852.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 99940477 is about 9997.0234069947. The cubic root of 99940477 is about 464.0667713189.

The spelling of 99940477 in words is "ninety-nine million, nine hundred forty thousand, four hundred seventy-seven".