123891845 has 24 divisors (see below), whose sum is σ = 188669088. Its totient is φ = 77229600.

The previous prime is 123891821. The next prime is 123891853. The reversal of 123891845 is 548198321.

It is not a de Polignac number, because 123891845 - 2⁸ = 123891589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20291 + ... + 25680.

It is an arithmetic number, because the mean of its divisors is an integer number (7861212).

Almost surely, 2^123891845 is an apocalyptic number.

It is an amenable number.

123891845 is a deficient number, since it is larger than the sum of its proper divisors (64777243).

123891845 is a wasteful number, since it uses less digits than its factorization.

123891845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46001 (or 45994 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 123891845 is about 11130.6713633994. The cubic root of 123891845 is about 498.5180721188.

The spelling of 123891845 in words is "one hundred twenty-three million, eight hundred ninety-one thousand, eight hundred forty-five".