99977603 has 4 divisors (see below), whose sum is σ = 109066488. Its totient is φ = 90888720.

The previous prime is 99977599. The next prime is 99977611. The reversal of 99977603 is 30677999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99977603 - 2² = 99977599 is a prime.

It is a super-2 number, since 2×99977603² = 19991042203251218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99977653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4544426 + ... + 4544447.

It is an arithmetic number, because the mean of its divisors is an integer number (27266622).

Almost surely, 2^99977603 is an apocalyptic number.

99977603 is a deficient number, since it is larger than the sum of its proper divisors (9088885).

99977603 is a wasteful number, since it uses less digits than its factorization.

99977603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088884.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 99977603 is about 9998.8800872898. The cubic root of 99977603 is about 464.1242282189.

The spelling of 99977603 in words is "ninety-nine million, nine hundred seventy-seven thousand, six hundred three".