63777401 has 2 divisors, whose sum is σ = 63777402. Its totient is φ = 63777400.

The previous prime is 63777397. The next prime is 63777419. The reversal of 63777401 is 10477736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33362176 + 30415225 = 5776^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 63777401 - 2² = 63777397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63777431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31888700 + 31888701.

It is an arithmetic number, because the mean of its divisors is an integer number (31888701).

Almost surely, 2^63777401 is an apocalyptic number.

It is an amenable number.

63777401 is a deficient number, since it is larger than the sum of its proper divisors (1).

63777401 is an equidigital number, since it uses as much as digits as its factorization.

63777401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 63777401 is about 7986.0754441716. The cubic root of 63777401 is about 399.5357133867.

The spelling of 63777401 in words is "sixty-three million, seven hundred seventy-seven thousand, four hundred one".