877981901 has 2 divisors, whose sum is σ = 877981902. Its totient is φ = 877981900.

The previous prime is 877981889. The next prime is 877981927. The reversal of 877981901 is 109189778.

877981901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870309001 + 7672900 = 29501^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 877981901 - 2¹⁰ = 877980877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 877981901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877981961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438990950 + 438990951.

It is an arithmetic number, because the mean of its divisors is an integer number (438990951).

Almost surely, 2^877981901 is an apocalyptic number.

It is an amenable number.

877981901 is a deficient number, since it is larger than the sum of its proper divisors (1).

877981901 is an equidigital number, since it uses as much as digits as its factorization.

877981901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 877981901 is about 29630.7593726519. The cubic root of 877981901 is about 957.5508683240.

The spelling of 877981901 in words is "eight hundred seventy-seven million, nine hundred eighty-one thousand, nine hundred one".