99749551 has 32 divisors (see below), whose sum is σ = 119066112. Its totient is φ = 82642560.

The previous prime is 99749539. The next prime is 99749567. The reversal of 99749551 is 15594799.

It is not a de Polignac number, because 99749551 - 2²³ = 91360943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99749495 and 99749504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99749581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576501 + ... + 576673.

It is an arithmetic number, because the mean of its divisors is an integer number (3720816).

Almost surely, 2^99749551 is an apocalyptic number.

99749551 is a deficient number, since it is larger than the sum of its proper divisors (19316561).

99749551 is a wasteful number, since it uses less digits than its factorization.

99749551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303.

The product of its digits is 510300, while the sum is 49.

The square root of 99749551 is about 9987.4696995786. The cubic root of 99749551 is about 463.7710656584.

The spelling of 99749551 in words is "ninety-nine million, seven hundred forty-nine thousand, five hundred fifty-one".