445658989 has 2 divisors, whose sum is σ = 445658990. Its totient is φ = 445658988.

The previous prime is 445658933. The next prime is 445659001. The reversal of 445658989 is 989856544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317018025 + 128640964 = 17805^2 + 11342^2 .

It is a cyclic number.

It is not a de Polignac number, because 445658989 - 2⁷ = 445658861 is a prime.

It is a super-2 number, since 2×445658989² = 397223868953004242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445658909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222829494 + 222829495.

It is an arithmetic number, because the mean of its divisors is an integer number (222829495).

Almost surely, 2^445658989 is an apocalyptic number.

It is an amenable number.

445658989 is a deficient number, since it is larger than the sum of its proper divisors (1).

445658989 is an equidigital number, since it uses as much as digits as its factorization.

445658989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12441600, while the sum is 58.

The square root of 445658989 is about 21110.6368686499. The cubic root of 445658989 is about 763.8373493330.

The spelling of 445658989 in words is "four hundred forty-five million, six hundred fifty-eight thousand, nine hundred eighty-nine".