77795401 has 4 divisors (see below), whose sum is σ = 77822100. Its totient is φ = 77768704.

The previous prime is 77795363. The next prime is 77795411. The reversal of 77795401 is 10459777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18490000 + 59305401 = 4300^2 + 7701^2 .

It is a cyclic number.

It is not a de Polignac number, because 77795401 - 2⁷ = 77795273 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77795411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8356 + ... + 15013.

It is an arithmetic number, because the mean of its divisors is an integer number (19455525).

Almost surely, 2^77795401 is an apocalyptic number.

77795401 is the 3945-th centered decagonal number.

It is an amenable number.

77795401 is a deficient number, since it is larger than the sum of its proper divisors (26699).

77795401 is a wasteful number, since it uses less digits than its factorization.

77795401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26698.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 77795401 is about 8820.1701230759. The cubic root of 77795401 is about 426.8919591295.

The spelling of 77795401 in words is "seventy-seven million, seven hundred ninety-five thousand, four hundred one".