123989351 has 4 divisors (see below), whose sum is σ = 124030152. Its totient is φ = 123948552.

The previous prime is 123989323. The next prime is 123989387. The reversal of 123989351 is 153989321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123989351 - 2⁶ = 123989287 is a prime.

It is a super-2 number, since 2×123989351² = 30746718322802402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123989299 and 123989308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123989311) 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, 15440 + ... + 22053.

It is an arithmetic number, because the mean of its divisors is an integer number (31007538).

Almost surely, 2^123989351 is an apocalyptic number.

123989351 is a deficient number, since it is larger than the sum of its proper divisors (40801).

123989351 is an equidigital number, since it uses as much as digits as its factorization.

123989351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40800.

The product of its digits is 58320, while the sum is 41.

The square root of 123989351 is about 11135.0505611784. The cubic root of 123989351 is about 498.6488199139.

The spelling of 123989351 in words is "one hundred twenty-three million, nine hundred eighty-nine thousand, three hundred fifty-one".