81313367 has 2 divisors, whose sum is σ = 81313368. Its totient is φ = 81313366.

The previous prime is 81313343. The next prime is 81313381. The reversal of 81313367 is 76331318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81313367 - 2¹⁴ = 81296983 is a prime.

It is a super-2 number, since 2×81313367² = 13223727305753378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81313327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40656683 + 40656684.

It is an arithmetic number, because the mean of its divisors is an integer number (40656684).

Almost surely, 2^81313367 is an apocalyptic number.

81313367 is a deficient number, since it is larger than the sum of its proper divisors (1).

81313367 is an equidigital number, since it uses as much as digits as its factorization.

81313367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 81313367 is about 9017.3924723281. The cubic root of 81313367 is about 433.2321202801.

The spelling of 81313367 in words is "eighty-one million, three hundred thirteen thousand, three hundred sixty-seven".