77812401 has 8 divisors (see below), whose sum is σ = 105957504. Its totient is φ = 50771120.

The previous prime is 77812367. The next prime is 77812411. The reversal of 77812401 is 10421877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77812401 - 2¹⁵ = 77779633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77812411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275790 + ... + 276071.

It is an arithmetic number, because the mean of its divisors is an integer number (13244688).

Almost surely, 2^77812401 is an apocalyptic number.

It is an amenable number.

77812401 is a deficient number, since it is larger than the sum of its proper divisors (28145103).

77812401 is a wasteful number, since it uses less digits than its factorization.

77812401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551911.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 77812401 is about 8821.1337706669. The cubic root of 77812401 is about 426.9230519476.

The spelling of 77812401 in words is "seventy-seven million, eight hundred twelve thousand, four hundred one".