27191939 has 2 divisors, whose sum is σ = 27191940. Its totient is φ = 27191938.

The previous prime is 27191921. The next prime is 27191947. The reversal of 27191939 is 93919172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27191939 - 2¹² = 27187843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27191896 and 27191905.

It is not a weakly prime, because it can be changed into another prime (27191999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13595969 + 13595970.

It is an arithmetic number, because the mean of its divisors is an integer number (13595970).

Almost surely, 2^27191939 is an apocalyptic number.

27191939 is a deficient number, since it is larger than the sum of its proper divisors (1).

27191939 is an equidigital number, since it uses as much as digits as its factorization.

27191939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 27191939 is about 5214.5890537990. The cubic root of 27191939 is about 300.7092072808.

The spelling of 27191939 in words is "twenty-seven million, one hundred ninety-one thousand, nine hundred thirty-nine".