76748109 has 4 divisors (see below), whose sum is σ = 102330816. Its totient is φ = 51165404.

The previous prime is 76748083. The next prime is 76748117. The reversal of 76748109 is 90184767.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90184767 = 3 ⋅30061589.

It is a cyclic number.

It is not a de Polignac number, because 76748109 - 2¹² = 76744013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76748129) 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, 12791349 + ... + 12791354.

It is an arithmetic number, because the mean of its divisors is an integer number (25582704).

Almost surely, 2^76748109 is an apocalyptic number.

It is an amenable number.

76748109 is a deficient number, since it is larger than the sum of its proper divisors (25582707).

76748109 is a wasteful number, since it uses less digits than its factorization.

76748109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25582706.

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

The square root of 76748109 is about 8760.5998082323. The cubic root of 76748109 is about 424.9676727430.

The spelling of 76748109 in words is "seventy-six million, seven hundred forty-eight thousand, one hundred nine".