445164919 has 2 divisors, whose sum is σ = 445164920. Its totient is φ = 445164918.

The previous prime is 445164901. The next prime is 445164953. The reversal of 445164919 is 919461544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445164919 - 2⁵ = 445164887 is a prime.

It is a super-2 number, since 2×445164919² = 396343610216553122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445144919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222582459 + 222582460.

It is an arithmetic number, because the mean of its divisors is an integer number (222582460).

Almost surely, 2^445164919 is an apocalyptic number.

445164919 is a deficient number, since it is larger than the sum of its proper divisors (1).

445164919 is an equidigital number, since it uses as much as digits as its factorization.

445164919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 445164919 is about 21098.9317028138. The cubic root of 445164919 is about 763.5549744860.

The spelling of 445164919 in words is "four hundred forty-five million, one hundred sixty-four thousand, nine hundred nineteen".