13898947 has 2 divisors, whose sum is σ = 13898948. Its totient is φ = 13898946.

The previous prime is 13898897. The next prime is 13898953. The reversal of 13898947 is 74989831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13898947 - 2¹⁹ = 13374659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13898947.

It is not a weakly prime, because it can be changed into another prime (13898957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6949473 + 6949474.

It is an arithmetic number, because the mean of its divisors is an integer number (6949474).

Almost surely, 2^13898947 is an apocalyptic number.

13898947 is a deficient number, since it is larger than the sum of its proper divisors (1).

13898947 is an equidigital number, since it uses as much as digits as its factorization.

13898947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 13898947 is about 3728.1291554880. The cubic root of 13898947 is about 240.4329396089.

The spelling of 13898947 in words is "thirteen million, eight hundred ninety-eight thousand, nine hundred forty-seven".