77328401 has 2 divisors, whose sum is σ = 77328402. Its totient is φ = 77328400.

The previous prime is 77328397. The next prime is 77328457. The reversal of 77328401 is 10482377.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73942801 + 3385600 = 8599^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 77328401 - 2² = 77328397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77328101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38664200 + 38664201.

It is an arithmetic number, because the mean of its divisors is an integer number (38664201).

Almost surely, 2^77328401 is an apocalyptic number.

It is an amenable number.

77328401 is a deficient number, since it is larger than the sum of its proper divisors (1).

77328401 is an equidigital number, since it uses as much as digits as its factorization.

77328401 is an evil number, because the sum of its binary digits is even.

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

The square root of 77328401 is about 8793.6568616247. The cubic root of 77328401 is about 426.0360439574.

The spelling of 77328401 in words is "seventy-seven million, three hundred twenty-eight thousand, four hundred one".