13453731 has 6 divisors (see below), whose sum is σ = 19433180. Its totient is φ = 8969148.

The previous prime is 13453723. The next prime is 13453747. The reversal of 13453731 is 13735431.

13453731 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13453731 - 2³ = 13453723 is a prime.

It is a super-2 number, since 2×13453731² = 362005755640722, 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 = 13453695 and 13453704.

It is not an unprimeable number, because it can be changed into a prime (13453631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 747421 + ... + 747438.

Almost surely, 2^13453731 is an apocalyptic number.

13453731 is a deficient number, since it is larger than the sum of its proper divisors (5979449).

13453731 is a wasteful number, since it uses less digits than its factorization.

13453731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494865 (or 1494862 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 13453731 is about 3667.9327965490. The cubic root of 13453731 is about 237.8378187987.

The spelling of 13453731 in words is "thirteen million, four hundred fifty-three thousand, seven hundred thirty-one".