56678389 has 4 divisors (see below), whose sum is σ = 56800224. Its totient is φ = 56556556.

The previous prime is 56678351. The next prime is 56678393. The reversal of 56678389 is 98387665.

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 56678389 - 2⁹ = 56677877 is a prime.

It is a super-3 number, since 3×56678389³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56678309) 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, 60217 + ... + 61150.

It is an arithmetic number, because the mean of its divisors is an integer number (14200056).

Almost surely, 2^56678389 is an apocalyptic number.

It is an amenable number.

56678389 is a deficient number, since it is larger than the sum of its proper divisors (121835).

56678389 is a wasteful number, since it uses less digits than its factorization.

56678389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121834.

The product of its digits is 2177280, while the sum is 52.

The square root of 56678389 is about 7528.5050972952. The cubic root of 56678389 is about 384.1249344820.

The spelling of 56678389 in words is "fifty-six million, six hundred seventy-eight thousand, three hundred eighty-nine".