13401947 has 4 divisors (see below), whose sum is σ = 14432880. Its totient is φ = 12371016.

The previous prime is 13401937. The next prime is 13401989. The reversal of 13401947 is 74910431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74910431 = 293 ⋅255667.

It is a cyclic number.

It is not a de Polignac number, because 13401947 - 2⁴ = 13401931 is a prime.

It is a super-2 number, since 2×13401947² = 359224366781618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401907) 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, 515447 + ... + 515472.

It is an arithmetic number, because the mean of its divisors is an integer number (3608220).

Almost surely, 2^13401947 is an apocalyptic number.

13401947 is a deficient number, since it is larger than the sum of its proper divisors (1030933).

13401947 is a wasteful number, since it uses less digits than its factorization.

13401947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030932.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 13401947 is about 3660.8669738192. The cubic root of 13401947 is about 237.5322770537.

The spelling of 13401947 in words is "thirteen million, four hundred one thousand, nine hundred forty-seven".