99751749 has 8 divisors (see below), whose sum is σ = 133321440. Its totient is φ = 66341616.

The previous prime is 99751739. The next prime is 99751781. The reversal of 99751749 is 94715799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99751749 - 2⁸ = 99751493 is a prime.

It is a super-2 number, since 2×99751749² = 19900822857118002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99751739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38422 + ... + 40935.

It is an arithmetic number, because the mean of its divisors is an integer number (16665180).

Almost surely, 2^99751749 is an apocalyptic number.

It is an amenable number.

99751749 is a deficient number, since it is larger than the sum of its proper divisors (33569691).

99751749 is a wasteful number, since it uses less digits than its factorization.

99751749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79779.

The product of its digits is 714420, while the sum is 51.

The square root of 99751749 is about 9987.5797368532. The cubic root of 99751749 is about 463.7744720608.

The spelling of 99751749 in words is "ninety-nine million, seven hundred fifty-one thousand, seven hundred forty-nine".