77683901 has 2 divisors, whose sum is σ = 77683902. Its totient is φ = 77683900.

The previous prime is 77683883. The next prime is 77683961. The reversal of 77683901 is 10938677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 1819801 = 8710^2 + 1349^2 .

It is a cyclic number.

It is not a de Polignac number, because 77683901 - 2¹⁴ = 77667517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77683961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38841950 + 38841951.

It is an arithmetic number, because the mean of its divisors is an integer number (38841951).

Almost surely, 2^77683901 is an apocalyptic number.

It is an amenable number.

77683901 is a deficient number, since it is larger than the sum of its proper divisors (1).

77683901 is an equidigital number, since it uses as much as digits as its factorization.

77683901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 77683901 is about 8813.8471168951. The cubic root of 77683901 is about 426.6879144556.

The spelling of 77683901 in words is "seventy-seven million, six hundred eighty-three thousand, nine hundred one".