77750401 has 4 divisors (see below), whose sum is σ = 82323972. Its totient is φ = 73176832.

The previous prime is 77750399. The next prime is 77750411. The reversal of 77750401 is 10405777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10405777 = 173 ⋅60149.

It can be written as a sum of positive squares in 2 ways, for example, as 27836176 + 49914225 = 5276^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 77750401 - 2¹ = 77750399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77750411) 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, 2286760 + ... + 2286793.

It is an arithmetic number, because the mean of its divisors is an integer number (20580993).

Almost surely, 2^77750401 is an apocalyptic number.

It is an amenable number.

77750401 is a deficient number, since it is larger than the sum of its proper divisors (4573571).

77750401 is a wasteful number, since it uses less digits than its factorization.

77750401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573570.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 77750401 is about 8817.6187828688. The cubic root of 77750401 is about 426.8096327405.

The spelling of 77750401 in words is "seventy-seven million, seven hundred fifty thousand, four hundred one".