123431747 has 4 divisors (see below), whose sum is σ = 130692456. Its totient is φ = 116171040.

The previous prime is 123431723. The next prime is 123431807. The reversal of 123431747 is 747134321.

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 123431747 - 2¹² = 123427651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123437747) 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, 3630329 + ... + 3630362.

It is an arithmetic number, because the mean of its divisors is an integer number (32673114).

Almost surely, 2^123431747 is an apocalyptic number.

123431747 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123431747 is a deficient number, since it is larger than the sum of its proper divisors (7260709).

123431747 is an equidigital number, since it uses as much as digits as its factorization.

123431747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260708.

The product of its digits is 14112, while the sum is 32.

The square root of 123431747 is about 11109.9841134000. The cubic root of 123431747 is about 497.9001899401.

The spelling of 123431747 in words is "one hundred twenty-three million, four hundred thirty-one thousand, seven hundred forty-seven".