13620487 has 4 divisors (see below), whose sum is σ = 13952736. Its totient is φ = 13288240.

The previous prime is 13620479. The next prime is 13620493. The reversal of 13620487 is 78402631.

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 13620487 - 2³ = 13620479 is a prime.

It is a super-2 number, since 2×13620487² = 371035332234338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620407) 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, 166063 + ... + 166144.

It is an arithmetic number, because the mean of its divisors is an integer number (3488184).

Almost surely, 2^13620487 is an apocalyptic number.

13620487 is a deficient number, since it is larger than the sum of its proper divisors (332249).

13620487 is an equidigital number, since it uses as much as digits as its factorization.

13620487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332248.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 13620487 is about 3690.5943965708. The cubic root of 13620487 is about 238.8164355562.

The spelling of 13620487 in words is "thirteen million, six hundred twenty thousand, four hundred eighty-seven".