27745947 has 12 divisors (see below), whose sum is σ = 42187080. Its totient is φ = 17523648.

The previous prime is 27745943. The next prime is 27745951. The reversal of 27745947 is 74954772.

It is an interprime number because it is at equal distance from previous prime (27745943) and next prime (27745951).

It is not a de Polignac number, because 27745947 - 2² = 27745943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27745943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80958 + ... + 81299.

It is an arithmetic number, because the mean of its divisors is an integer number (3515590).

Almost surely, 2^27745947 is an apocalyptic number.

27745947 is a deficient number, since it is larger than the sum of its proper divisors (14441133).

27745947 is a wasteful number, since it uses less digits than its factorization.

27745947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162282 (or 162279 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 27745947 is about 5267.4421686431. The cubic root of 27745947 is about 302.7377072005.

The spelling of 27745947 in words is "twenty-seven million, seven hundred forty-five thousand, nine hundred forty-seven".