15135947 has 2 divisors, whose sum is σ = 15135948. Its totient is φ = 15135946.

The previous prime is 15135931. The next prime is 15135949. The reversal of 15135947 is 74953151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15135947 - 2⁴ = 15135931 is a prime.

Together with 15135949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15135949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7567973 + 7567974.

It is an arithmetic number, because the mean of its divisors is an integer number (7567974).

Almost surely, 2^15135947 is an apocalyptic number.

15135947 is a deficient number, since it is larger than the sum of its proper divisors (1).

15135947 is an equidigital number, since it uses as much as digits as its factorization.

15135947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The square root of 15135947 is about 3890.4944415845. The cubic root of 15135947 is about 247.3640214866.

The spelling of 15135947 in words is "fifteen million, one hundred thirty-five thousand, nine hundred forty-seven".