27320731 has 2 divisors, whose sum is σ = 27320732. Its totient is φ = 27320730.

The previous prime is 27320687. The next prime is 27320743. The reversal of 27320731 is 13702372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27320731 - 2⁷ = 27320603 is a prime.

It is a super-2 number, since 2×27320731² = 1492844684748722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27320696 and 27320705.

It is not a weakly prime, because it can be changed into another prime (27320231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13660365 + 13660366.

It is an arithmetic number, because the mean of its divisors is an integer number (13660366).

Almost surely, 2^27320731 is an apocalyptic number.

27320731 is a deficient number, since it is larger than the sum of its proper divisors (1).

27320731 is an equidigital number, since it uses as much as digits as its factorization.

27320731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 27320731 is about 5226.9236650252. The cubic root of 27320731 is about 301.1832197607.

The spelling of 27320731 in words is "twenty-seven million, three hundred twenty thousand, seven hundred thirty-one".