77252647 has 2 divisors, whose sum is σ = 77252648. Its totient is φ = 77252646.

The previous prime is 77252621. The next prime is 77252671. The reversal of 77252647 is 74625277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77252647 - 2¹⁹ = 76728359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77232647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38626323 + 38626324.

It is an arithmetic number, because the mean of its divisors is an integer number (38626324).

Almost surely, 2^77252647 is an apocalyptic number.

77252647 is a deficient number, since it is larger than the sum of its proper divisors (1).

77252647 is an equidigital number, since it uses as much as digits as its factorization.

77252647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 40.

The square root of 77252647 is about 8789.3484969024. The cubic root of 77252647 is about 425.8968778436.

The spelling of 77252647 in words is "seventy-seven million, two hundred fifty-two thousand, six hundred forty-seven".