99977995 has 16 divisors (see below), whose sum is σ = 129894912. Its totient is φ = 73434240.

The previous prime is 99977989. The next prime is 99978001. The reversal of 99977995 is 59977999.

It is an interprime number because it is at equal distance from previous prime (99977989) and next prime (99978001).

It is not a de Polignac number, because 99977995 - 2¹⁹ = 99453707 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8389 + ... + 16441.

It is an arithmetic number, because the mean of its divisors is an integer number (8118432).

Almost surely, 2^99977995 is an apocalyptic number.

99977995 is a deficient number, since it is larger than the sum of its proper divisors (29916917).

99977995 is a wasteful number, since it uses less digits than its factorization.

99977995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8262.

The product of its digits is 14467005, while the sum is 64.

The square root of 99977995 is about 9998.8996894658. The cubic root of 99977995 is about 464.1248348096.

The spelling of 99977995 in words is "ninety-nine million, nine hundred seventy-seven thousand, nine hundred ninety-five".