1044777989 has 2 divisors, whose sum is σ = 1044777990. Its totient is φ = 1044777988.

The previous prime is 1044777961. The next prime is 1044778001. The reversal of 1044777989 is 9897774401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996475489 + 48302500 = 31567^2 + 6950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044777989 - 2⁸ = 1044777733 is a prime.

It is a super-2 number, since 2×1044777989² = 2183122092597768242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044777919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522388994 + 522388995.

It is an arithmetic number, because the mean of its divisors is an integer number (522388995).

Almost surely, 2^1044777989 is an apocalyptic number.

It is an amenable number.

1044777989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044777989 is an equidigital number, since it uses as much as digits as its factorization.

1044777989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 1044777989 is about 32323.0256782994. The cubic root of 1044777989 is about 1014.7085929285.

The spelling of 1044777989 in words is "one billion, forty-four million, seven hundred seventy-seven thousand, nine hundred eighty-nine".