76139493 has 4 divisors (see below), whose sum is σ = 101519328. Its totient is φ = 50759660.

The previous prime is 76139491. The next prime is 76139509. The reversal of 76139493 is 39493167.

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 a cyclic number.

It is not a de Polignac number, because 76139493 - 2¹ = 76139491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76139491) 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, 12689913 + ... + 12689918.

It is an arithmetic number, because the mean of its divisors is an integer number (25379832).

Almost surely, 2^76139493 is an apocalyptic number.

It is an amenable number.

76139493 is a deficient number, since it is larger than the sum of its proper divisors (25379835).

76139493 is a wasteful number, since it uses less digits than its factorization.

76139493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25379834.

The product of its digits is 122472, while the sum is 42.

The square root of 76139493 is about 8725.7946916026. The cubic root of 76139493 is about 423.8413525517.

The spelling of 76139493 in words is "seventy-six million, one hundred thirty-nine thousand, four hundred ninety-three".