13487972 has 6 divisors (see below), whose sum is σ = 23603958. Its totient is φ = 6743984.

The previous prime is 13487963. The next prime is 13487977. The reversal of 13487972 is 27978431.

It can be written as a sum of positive squares in only one way, i.e., 10719076 + 2768896 = 3274^2 + 1664^2 .

It is not an unprimeable number, because it can be changed into a prime (13487977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1685993 + ... + 1686000.

It is an arithmetic number, because the mean of its divisors is an integer number (3933993).

Almost surely, 2^13487972 is an apocalyptic number.

It is an amenable number.

13487972 is a deficient number, since it is larger than the sum of its proper divisors (10115986).

13487972 is a wasteful number, since it uses less digits than its factorization.

13487972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371997 (or 3371995 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 13487972 is about 3672.5974459502. The cubic root of 13487972 is about 238.0394210059.

The spelling of 13487972 in words is "thirteen million, four hundred eighty-seven thousand, nine hundred seventy-two".