874767989 has 2 divisors, whose sum is σ = 874767990. Its totient is φ = 874767988.

The previous prime is 874767983. The next prime is 874767991. The reversal of 874767989 is 989767478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 694322500 + 180445489 = 26350^2 + 13433^2 .

It is a cyclic number.

It is not a de Polignac number, because 874767989 - 2¹⁶ = 874702453 is a prime.

Together with 874767991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (874767983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437383994 + 437383995.

It is an arithmetic number, because the mean of its divisors is an integer number (437383995).

Almost surely, 2^874767989 is an apocalyptic number.

It is an amenable number.

874767989 is a deficient number, since it is larger than the sum of its proper divisors (1).

874767989 is an equidigital number, since it uses as much as digits as its factorization.

874767989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 65.

The square root of 874767989 is about 29576.4769538226. The cubic root of 874767989 is about 956.3810465653.

The spelling of 874767989 in words is "eight hundred seventy-four million, seven hundred sixty-seven thousand, nine hundred eighty-nine".