89945405 has 8 divisors (see below), whose sum is σ = 117746784. Its totient is φ = 65414800.

The previous prime is 89945389. The next prime is 89945407. The reversal of 89945405 is 50454998.

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

It is not a de Polignac number, because 89945405 - 2⁴ = 89945389 is a prime.

It is a super-2 number, since 2×89945405² = 16180351761228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89945407) 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, 817631 + ... + 817740.

It is an arithmetic number, because the mean of its divisors is an integer number (14718348).

Almost surely, 2^89945405 is an apocalyptic number.

It is an amenable number.

89945405 is a deficient number, since it is larger than the sum of its proper divisors (27801379).

89945405 is a wasteful number, since it uses less digits than its factorization.

89945405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635387.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 89945405 is about 9483.9551348580. The cubic root of 89945405 is about 448.0498406630.

The spelling of 89945405 in words is "eighty-nine million, nine hundred forty-five thousand, four hundred five".