99779001 has 32 divisors (see below), whose sum is σ = 161729280. Its totient is φ = 53415936.

The previous prime is 99778999. The next prime is 99779003. The reversal of 99779001 is 10097799.

99779001 is a nontrivial binomial coefficient, being equal to C(14127, 2).

It is an interprime number because it is at equal distance from previous prime (99778999) and next prime (99779003).

It is not a de Polignac number, because 99779001 - 2¹ = 99778999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99779003) 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, 98385 + ... + 99393.

It is an arithmetic number, because the mean of its divisors is an integer number (5054040).

Almost surely, 2^99779001 is an apocalyptic number.

99779001 is the 14126-th triangular number.

It is an amenable number.

99779001 is a deficient number, since it is larger than the sum of its proper divisors (61950279).

99779001 is a wasteful number, since it uses less digits than its factorization.

99779001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313.

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 99779001 is about 9988.9439381748. The cubic root of 99779001 is about 463.8167023349.

The spelling of 99779001 in words is "ninety-nine million, seven hundred seventy-nine thousand, one".