123485431 has 4 divisors (see below), whose sum is σ = 127468864. Its totient is φ = 119502000.

The previous prime is 123485419. The next prime is 123485437. The reversal of 123485431 is 134584321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134584321 = 79 ⋅1703599.

It is a cyclic number.

It is not a de Polignac number, because 123485431 - 2¹¹ = 123483383 is a prime.

It is a super-2 number, since 2×123485431² = 30497303338511522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3983401 = 123485431 / (1 + 2 + 3 + 4 + 8 + 5 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123485393 and 123485402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123485437) 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, 1991670 + ... + 1991731.

It is an arithmetic number, because the mean of its divisors is an integer number (31867216).

Almost surely, 2^123485431 is an apocalyptic number.

123485431 is a deficient number, since it is larger than the sum of its proper divisors (3983433).

123485431 is an equidigital number, since it uses as much as digits as its factorization.

123485431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983432.

The product of its digits is 11520, while the sum is 31.

The square root of 123485431 is about 11112.3998758144. The cubic root of 123485431 is about 497.9723631593.

The spelling of 123485431 in words is "one hundred twenty-three million, four hundred eighty-five thousand, four hundred thirty-one".