45678989 has 4 divisors (see below), whose sum is σ = 47665056. Its totient is φ = 43692924.

The previous prime is 45678977. The next prime is 45679019. The reversal of 45678989 is 98987654.

45678989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 not a de Polignac number, because 45678989 - 2²⁰ = 44630413 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45678929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992999 + ... + 993044.

It is an arithmetic number, because the mean of its divisors is an integer number (11916264).

Almost surely, 2^45678989 is an apocalyptic number.

It is an amenable number.

45678989 is a deficient number, since it is larger than the sum of its proper divisors (1986067).

45678989 is a wasteful number, since it uses less digits than its factorization.

45678989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986066.

The product of its digits is 4354560, while the sum is 56.

The square root of 45678989 is about 6758.6233065618. The cubic root of 45678989 is about 357.4693640919.

The spelling of 45678989 in words is "forty-five million, six hundred seventy-eight thousand, nine hundred eighty-nine".