123492147 has 4 divisors (see below), whose sum is σ = 164656200. Its totient is φ = 82328096.

The previous prime is 123492139. The next prime is 123492151. The reversal of 123492147 is 741294321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741294321 = 3 ⋅247098107.

It is a cyclic number.

It is not a de Polignac number, because 123492147 - 2³ = 123492139 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123492157) 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, 20582022 + ... + 20582027.

It is an arithmetic number, because the mean of its divisors is an integer number (41164050).

Almost surely, 2^123492147 is an apocalyptic number.

123492147 is a deficient number, since it is larger than the sum of its proper divisors (41164053).

123492147 is an equidigital number, since it uses as much as digits as its factorization.

123492147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41164052.

The product of its digits is 12096, while the sum is 33.

The square root of 123492147 is about 11112.7020566557. The cubic root of 123492147 is about 497.9813907338.

The spelling of 123492147 in words is "one hundred twenty-three million, four hundred ninety-two thousand, one hundred forty-seven".