873789949 has 2 divisors, whose sum is σ = 873789950. Its totient is φ = 873789948.

The previous prime is 873789881. The next prime is 873790009. The reversal of 873789949 is 949987378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767844100 + 105945849 = 27710^2 + 10293^2 .

It is a cyclic number.

It is not a de Polignac number, because 873789949 - 2⁷ = 873789821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873789149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436894974 + 436894975.

It is an arithmetic number, because the mean of its divisors is an integer number (436894975).

Almost surely, 2^873789949 is an apocalyptic number.

It is an amenable number.

873789949 is a deficient number, since it is larger than the sum of its proper divisors (1).

873789949 is an equidigital number, since it uses as much as digits as its factorization.

873789949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 64.

The square root of 873789949 is about 29559.9382441845. The cubic root of 873789949 is about 956.0244843113.

The spelling of 873789949 in words is "eight hundred seventy-three million, seven hundred eighty-nine thousand, nine hundred forty-nine".