77401823 has 12 divisors (see below), whose sum is σ = 80552160. Its totient is φ = 74370240.

The previous prime is 77401811. The next prime is 77401843. The reversal of 77401823 is 32810477.

It is a happy number.

It is not a de Polignac number, because 77401823 - 2⁶ = 77401759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77401823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77401843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229511 + ... + 229847.

It is an arithmetic number, because the mean of its divisors is an integer number (6712680).

Almost surely, 2^77401823 is an apocalyptic number.

77401823 is a deficient number, since it is larger than the sum of its proper divisors (3150337).

77401823 is a wasteful number, since it uses less digits than its factorization.

77401823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 77401823 is about 8797.8305848658. The cubic root of 77401823 is about 426.1708392941.

The spelling of 77401823 in words is "seventy-seven million, four hundred one thousand, eight hundred twenty-three".