123191492 has 12 divisors (see below), whose sum is σ = 216002556. Its totient is φ = 61476480.

The previous prime is 123191491. The next prime is 123191501. The reversal of 123191492 is 294191321.

It can be written as a sum of positive squares in 2 ways, for example, as 91087936 + 32103556 = 9544^2 + 5666^2 .

It is a super-2 number, since 2×123191492² = 30352287402372128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123191491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27473 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (18000213).

Almost surely, 2^123191492 is an apocalyptic number.

It is an amenable number.

123191492 is a deficient number, since it is larger than the sum of its proper divisors (92811064).

123191492 is a wasteful number, since it uses less digits than its factorization.

123191492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59638 (or 59636 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 123191492 is about 11099.1662749956. The cubic root of 123191492 is about 497.5769324560.

The spelling of 123191492 in words is "one hundred twenty-three million, one hundred ninety-one thousand, four hundred ninety-two".