445423139 has 8 divisors (see below), whose sum is σ = 521471328. Its totient is φ = 372479040.

The previous prime is 445423117. The next prime is 445423201. The reversal of 445423139 is 931324544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445423139 - 2⁸ = 445422883 is a prime.

It is a super-2 number, since 2×445423139² = 396803545513226642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445423099 and 445423108.

It is not an unprimeable number, because it can be changed into a prime (445423109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775712 + ... + 776285.

It is an arithmetic number, because the mean of its divisors is an integer number (65183916).

Almost surely, 2^445423139 is an apocalyptic number.

445423139 is a deficient number, since it is larger than the sum of its proper divisors (76048189).

445423139 is a wasteful number, since it uses less digits than its factorization.

445423139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552045.

The product of its digits is 51840, while the sum is 35.

The square root of 445423139 is about 21105.0500828593. The cubic root of 445423139 is about 763.7025804984.

The spelling of 445423139 in words is "four hundred forty-five million, four hundred twenty-three thousand, one hundred thirty-nine".