123731653 has 2 divisors, whose sum is σ = 123731654. Its totient is φ = 123731652.

The previous prime is 123731639. The next prime is 123731659. The reversal of 123731653 is 356137321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108847489 + 14884164 = 10433^2 + 3858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123731653 is a prime.

It is a super-2 number, since 2×123731653² = 30619043908224818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123731659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61865826 + 61865827.

It is an arithmetic number, because the mean of its divisors is an integer number (61865827).

Almost surely, 2^123731653 is an apocalyptic number.

It is an amenable number.

123731653 is a deficient number, since it is larger than the sum of its proper divisors (1).

123731653 is an equidigital number, since it uses as much as digits as its factorization.

123731653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 123731653 is about 11123.4730637513. The cubic root of 123731653 is about 498.3031183668.

Adding to 123731653 its reverse (356137321), we get a palindrome (479868974).

The spelling of 123731653 in words is "one hundred twenty-three million, seven hundred thirty-one thousand, six hundred fifty-three".