877387397 has 2 divisors, whose sum is σ = 877387398. Its totient is φ = 877387396.

The previous prime is 877387393. The next prime is 877387421. The reversal of 877387397 is 793783778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644702881 + 232684516 = 25391^2 + 15254^2 .

It is a cyclic number.

It is not a de Polignac number, because 877387397 - 2² = 877387393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877387393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438693698 + 438693699.

It is an arithmetic number, because the mean of its divisors is an integer number (438693699).

Almost surely, 2^877387397 is an apocalyptic number.

It is an amenable number.

877387397 is a deficient number, since it is larger than the sum of its proper divisors (1).

877387397 is an equidigital number, since it uses as much as digits as its factorization.

877387397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12446784, while the sum is 59.

The square root of 877387397 is about 29620.7258013709. The cubic root of 877387397 is about 957.3346921296.

The spelling of 877387397 in words is "eight hundred seventy-seven million, three hundred eighty-seven thousand, three hundred ninety-seven".