1445713919 has 4 divisors (see below), whose sum is σ = 1556922696. Its totient is φ = 1334505144.

The previous prime is 1445713883. The next prime is 1445713931. The reversal of 1445713919 is 9193175441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1445713919 - 2⁸ = 1445713663 is a prime.

It is a super-2 number, since 2×1445713919² = 4180177471180677122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445713919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445713219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55604369 + ... + 55604394.

It is an arithmetic number, because the mean of its divisors is an integer number (389230674).

Almost surely, 2^1445713919 is an apocalyptic number.

1445713919 is a deficient number, since it is larger than the sum of its proper divisors (111208777).

1445713919 is a wasteful number, since it uses less digits than its factorization.

1445713919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111208776.

The product of its digits is 136080, while the sum is 44.

The square root of 1445713919 is about 38022.5448780063. The cubic root of 1445713919 is about 1130.7348755738.

The spelling of 1445713919 in words is "one billion, four hundred forty-five million, seven hundred thirteen thousand, nine hundred nineteen".