123931970 has 8 divisors (see below), whose sum is σ = 223077564. Its totient is φ = 49572784.

The previous prime is 123931963. The next prime is 123931979. The reversal of 123931970 is 79139321.

It can be written as a sum of positive squares in 2 ways, for example, as 119399329 + 4532641 = 10927^2 + 2129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123931970.

It is not an unprimeable number, because it can be changed into a prime (123931979) 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, 6196589 + ... + 6196608.

Almost surely, 2^123931970 is an apocalyptic number.

123931970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123931970 is a deficient number, since it is larger than the sum of its proper divisors (99145594).

123931970 is a wasteful number, since it uses less digits than its factorization.

123931970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12393204.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 123931970 is about 11132.4736694052. The cubic root of 123931970 is about 498.5718848578.

The spelling of 123931970 in words is "one hundred twenty-three million, nine hundred thirty-one thousand, nine hundred seventy".