27020639 has 2 divisors, whose sum is σ = 27020640. Its totient is φ = 27020638.

The previous prime is 27020573. The next prime is 27020659. The reversal of 27020639 is 93602072.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27020639 - 2¹² = 27016543 is a prime.

It is a super-2 number, since 2×27020639² = 1460229863936642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27020659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13510319 + 13510320.

It is an arithmetic number, because the mean of its divisors is an integer number (13510320).

Almost surely, 2^27020639 is an apocalyptic number.

27020639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27020639 is an equidigital number, since it uses as much as digits as its factorization.

27020639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 27020639 is about 5198.1380320265. The cubic root of 27020639 is about 300.0764212717.

It can be divided in two parts, 2702063 and 9, that added together give a palindrome (2702072).

The spelling of 27020639 in words is "twenty-seven million, twenty thousand, six hundred thirty-nine".