123989510 has 16 divisors (see below), whose sum is σ = 223331472. Its totient is φ = 49562400.

The previous prime is 123989507. The next prime is 123989513. The reversal of 123989510 is 15989321.

It is an interprime number because it is at equal distance from previous prime (123989507) and next prime (123989513).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123989513) 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, 16100 + ... + 22520.

It is an arithmetic number, because the mean of its divisors is an integer number (13958217).

Almost surely, 2^123989510 is an apocalyptic number.

123989510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123989510 is a deficient number, since it is larger than the sum of its proper divisors (99341962).

123989510 is a wasteful number, since it uses less digits than its factorization.

123989510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8359.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 123989510 is about 11135.0577007935. The cubic root of 123989510 is about 498.6490330642.

The spelling of 123989510 in words is "one hundred twenty-three million, nine hundred eighty-nine thousand, five hundred ten".