76426391 has 4 divisors (see below), whose sum is σ = 76452000. Its totient is φ = 76400784.

The previous prime is 76426387. The next prime is 76426393. The reversal of 76426391 is 19362467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19362467 = 3581 ⋅5407.

It is a cyclic number.

It is not a de Polignac number, because 76426391 - 2² = 76426387 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 (76426393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7631 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (19113000).

Almost surely, 2^76426391 is an apocalyptic number.

76426391 is a deficient number, since it is larger than the sum of its proper divisors (25609).

76426391 is a wasteful number, since it uses less digits than its factorization.

76426391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25608.

The product of its digits is 54432, while the sum is 38.

The square root of 76426391 is about 8742.2188830983. The cubic root of 76426391 is about 424.3730381878.

The spelling of 76426391 in words is "seventy-six million, four hundred twenty-six thousand, three hundred ninety-one".