13640373 has 16 divisors (see below), whose sum is σ = 20266560. Its totient is φ = 9067248.

The previous prime is 13640371. The next prime is 13640381. The reversal of 13640373 is 37304631.

It is a happy number.

13640373 is a `hidden beast` number, since 13 + 640 + 3 + 7 + 3 = 666.

It is not a de Polignac number, because 13640373 - 2¹ = 13640371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14586 + ... + 15492.

It is an arithmetic number, because the mean of its divisors is an integer number (1266660).

Almost surely, 2^13640373 is an apocalyptic number.

It is an amenable number.

13640373 is a deficient number, since it is larger than the sum of its proper divisors (6626187).

13640373 is an equidigital number, since it uses as much as digits as its factorization.

13640373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 13640373 is about 3693.2875598848. The cubic root of 13640373 is about 238.9326035579.

The spelling of 13640373 in words is "thirteen million, six hundred forty thousand, three hundred seventy-three".