877428869 has 2 divisors, whose sum is σ = 877428870. Its totient is φ = 877428868.

The previous prime is 877428821. The next prime is 877428887. The reversal of 877428869 is 968824778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743216644 + 134212225 = 27262^2 + 11585^2 .

It is a cyclic number.

It is not a de Polignac number, because 877428869 - 2⁸ = 877428613 is a prime.

It is a super-2 number, since 2×877428869² = 1539762840309238322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877428809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438714434 + 438714435.

It is an arithmetic number, because the mean of its divisors is an integer number (438714435).

Almost surely, 2^877428869 is an apocalyptic number.

It is an amenable number.

877428869 is a deficient number, since it is larger than the sum of its proper divisors (1).

877428869 is an equidigital number, since it uses as much as digits as its factorization.

877428869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 59.

The square root of 877428869 is about 29621.4258434668. The cubic root of 877428869 is about 957.3497755309.

The spelling of 877428869 in words is "eight hundred seventy-seven million, four hundred twenty-eight thousand, eight hundred sixty-nine".