76506149 has 4 divisors (see below), whose sum is σ = 76630764. Its totient is φ = 76381536.

The previous prime is 76506127. The next prime is 76506151. The reversal of 76506149 is 94160567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94160567 = 1061 ⋅88747.

It can be written as a sum of positive squares in 2 ways, for example, as 7317025 + 69189124 = 2705^2 + 8318^2 .

It is a cyclic number.

It is not a de Polignac number, because 76506149 - 2²⁰ = 75457573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76506449) 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, 61382 + ... + 62615.

It is an arithmetic number, because the mean of its divisors is an integer number (19157691).

Almost surely, 2^76506149 is an apocalyptic number.

It is an amenable number.

76506149 is a deficient number, since it is larger than the sum of its proper divisors (124615).

76506149 is a wasteful number, since it uses less digits than its factorization.

76506149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124614.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 76506149 is about 8746.7793501380. The cubic root of 76506149 is about 424.5206110221.

The spelling of 76506149 in words is "seventy-six million, five hundred six thousand, one hundred forty-nine".