123947931 has 8 divisors (see below), whose sum is σ = 165382144. Its totient is φ = 82572840.

The previous prime is 123947921. The next prime is 123947939. The reversal of 123947931 is 139749321.

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

It is not a de Polignac number, because 123947931 - 2¹⁷ = 123816859 is a prime.

It is a super-2 number, since 2×123947931² = 30726179198361522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123947931.

It is not an unprimeable number, because it can be changed into a prime (123947939) 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, 9631 + ... + 18456.

It is an arithmetic number, because the mean of its divisors is an integer number (20672768).

Almost surely, 2^123947931 is an apocalyptic number.

123947931 is a deficient number, since it is larger than the sum of its proper divisors (41434213).

123947931 is a wasteful number, since it uses less digits than its factorization.

123947931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29561.

The product of its digits is 40824, while the sum is 39.

The square root of 123947931 is about 11133.1905130560. The cubic root of 123947931 is about 498.5932873640.

The spelling of 123947931 in words is "one hundred twenty-three million, nine hundred forty-seven thousand, nine hundred thirty-one".