124431397 has 4 divisors (see below), whose sum is σ = 124462476. Its totient is φ = 124400320.

The previous prime is 124431383. The next prime is 124431401. The reversal of 124431397 is 793134421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793134421 = 9739 ⋅81439.

It can be written as a sum of positive squares in 2 ways, for example, as 57289761 + 67141636 = 7569^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 124431397 - 2¹⁹ = 123907109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124431337) 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, 8458 + ... + 17899.

It is an arithmetic number, because the mean of its divisors is an integer number (31115619).

Almost surely, 2^124431397 is an apocalyptic number.

It is an amenable number.

124431397 is a deficient number, since it is larger than the sum of its proper divisors (31079).

124431397 is an equidigital number, since it uses as much as digits as its factorization.

124431397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31078.

The product of its digits is 18144, while the sum is 34.

The square root of 124431397 is about 11154.8822046672. The cubic root of 124431397 is about 499.2407102084.

The spelling of 124431397 in words is "one hundred twenty-four million, four hundred thirty-one thousand, three hundred ninety-seven".