77653963 has 2 divisors, whose sum is σ = 77653964. Its totient is φ = 77653962.

The previous prime is 77653921. The next prime is 77653973. The reversal of 77653963 is 36935677.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77653963 is a prime.

It is not a weakly prime, because it can be changed into another prime (77653973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38826981 + 38826982.

It is an arithmetic number, because the mean of its divisors is an integer number (38826982).

Almost surely, 2^77653963 is an apocalyptic number.

77653963 is a deficient number, since it is larger than the sum of its proper divisors (1).

77653963 is an equidigital number, since it uses as much as digits as its factorization.

77653963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 46.

The square root of 77653963 is about 8812.1486029231. The cubic root of 77653963 is about 426.6330947570.

The spelling of 77653963 in words is "seventy-seven million, six hundred fifty-three thousand, nine hundred sixty-three".