76899861 has 10 divisors (see below), whose sum is σ = 114875222. Its totient is φ = 51266520.

The previous prime is 76899839. The next prime is 76899883. The reversal of 76899861 is 16899867.

It is an interprime number because it is at equal distance from previous prime (76899839) and next prime (76899883).

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 23097636 = 7335^2 + 4806^2 .

It is not a de Polignac number, because 76899861 - 2⁵ = 76899829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76899798 and 76899807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76899961) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 474610 + ... + 474771.

Almost surely, 2^76899861 is an apocalyptic number.

It is an amenable number.

76899861 is a deficient number, since it is larger than the sum of its proper divisors (37975361).

76899861 is an equidigital number, since it uses as much as digits as its factorization.

76899861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949393 (or 949384 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 76899861 is about 8769.2565819458. The cubic root of 76899861 is about 425.2475807744.

The spelling of 76899861 in words is "seventy-six million, eight hundred ninety-nine thousand, eight hundred sixty-one".