84777401 has 2 divisors, whose sum is σ = 84777402. Its totient is φ = 84777400.

The previous prime is 84777391. The next prime is 84777409. The reversal of 84777401 is 10477748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 19571776 = 8075^2 + 4424^2 .

It is a cyclic number.

It is not a de Polignac number, because 84777401 - 2¹⁸ = 84515257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84777409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42388700 + 42388701.

It is an arithmetic number, because the mean of its divisors is an integer number (42388701).

Almost surely, 2^84777401 is an apocalyptic number.

It is an amenable number.

84777401 is a deficient number, since it is larger than the sum of its proper divisors (1).

84777401 is an equidigital number, since it uses as much as digits as its factorization.

84777401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 84777401 is about 9207.4644175256. The cubic root of 84777401 is about 439.2988160381.

The spelling of 84777401 in words is "eighty-four million, seven hundred seventy-seven thousand, four hundred one".