76243457 has 2 divisors, whose sum is σ = 76243458. Its totient is φ = 76243456.

The previous prime is 76243451. The next prime is 76243471. The reversal of 76243457 is 75434267.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 6370576 = 8359^2 + 2524^2 .

It is an emirp because it is prime and its reverse (75434267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76243457 - 2⁶ = 76243393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76243457.

It is not a weakly prime, because it can be changed into another prime (76243451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38121728 + 38121729.

It is an arithmetic number, because the mean of its divisors is an integer number (38121729).

Almost surely, 2^76243457 is an apocalyptic number.

It is an amenable number.

76243457 is a deficient number, since it is larger than the sum of its proper divisors (1).

76243457 is an equidigital number, since it uses as much as digits as its factorization.

76243457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 38.

The square root of 76243457 is about 8731.7499391588. The cubic root of 76243457 is about 424.0341749628.

The spelling of 76243457 in words is "seventy-six million, two hundred forty-three thousand, four hundred fifty-seven".