77402051 has 2 divisors, whose sum is σ = 77402052. Its totient is φ = 77402050.

The previous prime is 77402047. The next prime is 77402063. The reversal of 77402051 is 15020477.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77402051 - 2² = 77402047 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 77402051.

It is not a weakly prime, because it can be changed into another prime (77402081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38701025 + 38701026.

It is an arithmetic number, because the mean of its divisors is an integer number (38701026).

Almost surely, 2^77402051 is an apocalyptic number.

77402051 is a deficient number, since it is larger than the sum of its proper divisors (1).

77402051 is an equidigital number, since it uses as much as digits as its factorization.

77402051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 77402051 is about 8797.8435425961. The cubic root of 77402051 is about 426.1712577462.

The spelling of 77402051 in words is "seventy-seven million, four hundred two thousand, fifty-one".