76974239 has 2 divisors, whose sum is σ = 76974240. Its totient is φ = 76974238.

The previous prime is 76974217. The next prime is 76974251. The reversal of 76974239 is 93247967.

It is a strong prime.

It is an emirp because it is prime and its reverse (93247967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76974239 - 2¹⁶ = 76908703 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 76974193 and 76974202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76974259) 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 as a sum of consecutive naturals, namely, 38487119 + 38487120.

It is an arithmetic number, because the mean of its divisors is an integer number (38487120).

Almost surely, 2^76974239 is an apocalyptic number.

76974239 is a deficient number, since it is larger than the sum of its proper divisors (1).

76974239 is an equidigital number, since it uses as much as digits as its factorization.

76974239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 76974239 is about 8773.4963953945. The cubic root of 76974239 is about 425.3846372543.

The spelling of 76974239 in words is "seventy-six million, nine hundred seventy-four thousand, two hundred thirty-nine".