13900247 has 2 divisors, whose sum is σ = 13900248. Its totient is φ = 13900246.

The previous prime is 13900231. The next prime is 13900261. The reversal of 13900247 is 74200931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13900247 - 2⁴ = 13900231 is a prime.

It is a super-2 number, since 2×13900247² = 386433733322018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13900147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6950123 + 6950124.

It is an arithmetic number, because the mean of its divisors is an integer number (6950124).

Almost surely, 2^13900247 is an apocalyptic number.

13900247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13900247 is an equidigital number, since it uses as much as digits as its factorization.

13900247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 13900247 is about 3728.3035015943. The cubic root of 13900247 is about 240.4404354544.

The spelling of 13900247 in words is "thirteen million, nine hundred thousand, two hundred forty-seven".