27971954 has 4 divisors (see below), whose sum is σ = 41957934. Its totient is φ = 13985976.

The previous prime is 27971947. The next prime is 27971989. The reversal of 27971954 is 45917972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 4108729 = 4885^2 + 2027^2 .

It is an unprimeable number.

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, 6992987 + ... + 6992990.

Almost surely, 2^27971954 is an apocalyptic number.

27971954 is a deficient number, since it is larger than the sum of its proper divisors (13985980).

27971954 is a wasteful number, since it uses less digits than its factorization.

27971954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13985979.

The product of its digits is 158760, while the sum is 44.

The square root of 27971954 is about 5288.8518602812. The cubic root of 27971954 is about 303.5574773961.

The spelling of 27971954 in words is "twenty-seven million, nine hundred seventy-one thousand, nine hundred fifty-four".