45621389 has 4 divisors (see below), whose sum is σ = 49768800. Its totient is φ = 41473980.

The previous prime is 45621371. The next prime is 45621419. The reversal of 45621389 is 98312654.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45621389 is a prime.

It is a super-3 number, since 3×45621389³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45221389) 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, 2073689 + ... + 2073710.

It is an arithmetic number, because the mean of its divisors is an integer number (12442200).

Almost surely, 2^45621389 is an apocalyptic number.

It is an amenable number.

45621389 is a deficient number, since it is larger than the sum of its proper divisors (4147411).

45621389 is a wasteful number, since it uses less digits than its factorization.

45621389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147410.

The product of its digits is 51840, while the sum is 38.

The square root of 45621389 is about 6754.3607395519. The cubic root of 45621389 is about 357.3190477469.

The spelling of 45621389 in words is "forty-five million, six hundred twenty-one thousand, three hundred eighty-nine".