76807149 has 4 divisors (see below), whose sum is σ = 102409536. Its totient is φ = 51204764.

The previous prime is 76807147. The next prime is 76807151. The reversal of 76807149 is 94170867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (76807147) and next prime (76807151).

It is a cyclic number.

It is not a de Polignac number, because 76807149 - 2¹ = 76807147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76807149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76807147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12801189 + ... + 12801194.

It is an arithmetic number, because the mean of its divisors is an integer number (25602384).

Almost surely, 2^76807149 is an apocalyptic number.

It is an amenable number.

76807149 is a deficient number, since it is larger than the sum of its proper divisors (25602387).

76807149 is a wasteful number, since it uses less digits than its factorization.

76807149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25602386.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 76807149 is about 8763.9687927331. The cubic root of 76807149 is about 425.0766164064.

The spelling of 76807149 in words is "seventy-six million, eight hundred seven thousand, one hundred forty-nine".