123497531 has 4 divisors (see below), whose sum is σ = 125189352. Its totient is φ = 121805712.

The previous prime is 123497501. The next prime is 123497599. The reversal of 123497531 is 135794321.

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 123497531 - 2¹⁴ = 123481147 is a prime.

It is a super-2 number, since 2×123497531² = 30503280326191922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123497491 and 123497500.

It is not an unprimeable number, because it can be changed into a prime (123497501) 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, 845801 + ... + 845946.

It is an arithmetic number, because the mean of its divisors is an integer number (31297338).

Almost surely, 2^123497531 is an apocalyptic number.

123497531 is a deficient number, since it is larger than the sum of its proper divisors (1691821).

123497531 is an equidigital number, since it uses as much as digits as its factorization.

123497531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691820.

The product of its digits is 22680, while the sum is 35.

The square root of 123497531 is about 11112.9442993295. The cubic root of 123497531 is about 497.9886276119.

The spelling of 123497531 in words is "one hundred twenty-three million, four hundred ninety-seven thousand, five hundred thirty-one".