445989311 has 2 divisors, whose sum is σ = 445989312. Its totient is φ = 445989310.

The previous prime is 445989293. The next prime is 445989317. The reversal of 445989311 is 113989544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445989311 - 2²² = 441795007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445989317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222994655 + 222994656.

It is an arithmetic number, because the mean of its divisors is an integer number (222994656).

Almost surely, 2^445989311 is an apocalyptic number.

445989311 is a deficient number, since it is larger than the sum of its proper divisors (1).

445989311 is an equidigital number, since it uses as much as digits as its factorization.

445989311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 445989311 is about 21118.4590110169. The cubic root of 445989311 is about 764.0260212211.

The spelling of 445989311 in words is "four hundred forty-five million, nine hundred eighty-nine thousand, three hundred eleven".