27861007 has 2 divisors, whose sum is σ = 27861008. Its totient is φ = 27861006.

The previous prime is 27860999. The next prime is 27861013. The reversal of 27861007 is 70016872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27861007 - 2³ = 27860999 is a prime.

It is a super-2 number, since 2×27861007² = 1552471422108098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27861007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27861047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13930503 + 13930504.

It is an arithmetic number, because the mean of its divisors is an integer number (13930504).

Almost surely, 2^27861007 is an apocalyptic number.

27861007 is a deficient number, since it is larger than the sum of its proper divisors (1).

27861007 is an equidigital number, since it uses as much as digits as its factorization.

27861007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 27861007 is about 5278.3526786300. The cubic root of 27861007 is about 303.1556056106.

Adding to 27861007 its reverse (70016872), we get a palindrome (97877879).

The spelling of 27861007 in words is "twenty-seven million, eight hundred sixty-one thousand, seven".