76431407 has 4 divisors (see below), whose sum is σ = 82310760. Its totient is φ = 70552056.

The previous prime is 76431403. The next prime is 76431409. The reversal of 76431407 is 70413467.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70413467 = 293 ⋅240319.

It is a cyclic number.

It is not a de Polignac number, because 76431407 - 2² = 76431403 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 (76431401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2939657 + ... + 2939682.

It is an arithmetic number, because the mean of its divisors is an integer number (20577690).

Almost surely, 2^76431407 is an apocalyptic number.

76431407 is a deficient number, since it is larger than the sum of its proper divisors (5879353).

76431407 is a wasteful number, since it uses less digits than its factorization.

76431407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5879352.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 76431407 is about 8742.5057620799. The cubic root of 76431407 is about 424.3823221039.

The spelling of 76431407 in words is "seventy-six million, four hundred thirty-one thousand, four hundred seven".