27131947 has 2 divisors, whose sum is σ = 27131948. Its totient is φ = 27131946.

The previous prime is 27131939. The next prime is 27131959. The reversal of 27131947 is 74913172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27131947 - 2³ = 27131939 is a prime.

It is a super-2 number, since 2×27131947² = 1472285096021618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27131977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13565973 + 13565974.

It is an arithmetic number, because the mean of its divisors is an integer number (13565974).

Almost surely, 2^27131947 is an apocalyptic number.

27131947 is a deficient number, since it is larger than the sum of its proper divisors (1).

27131947 is an equidigital number, since it uses as much as digits as its factorization.

27131947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 27131947 is about 5208.8335546454. The cubic root of 27131947 is about 300.4878986787.

The spelling of 27131947 in words is "twenty-seven million, one hundred thirty-one thousand, nine hundred forty-seven".