81153367 has 2 divisors, whose sum is σ = 81153368. Its totient is φ = 81153366.

The previous prime is 81153353. The next prime is 81153383. The reversal of 81153367 is 76335118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81153367 - 2⁷ = 81153239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81153967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40576683 + 40576684.

It is an arithmetic number, because the mean of its divisors is an integer number (40576684).

Almost surely, 2^81153367 is an apocalyptic number.

81153367 is a deficient number, since it is larger than the sum of its proper divisors (1).

81153367 is an equidigital number, since it uses as much as digits as its factorization.

81153367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 81153367 is about 9008.5163595345. The cubic root of 81153367 is about 432.9477773052.

The spelling of 81153367 in words is "eighty-one million, one hundred fifty-three thousand, three hundred sixty-seven".