81465119 has 2 divisors, whose sum is σ = 81465120. Its totient is φ = 81465118.

The previous prime is 81465113. The next prime is 81465221. The reversal of 81465119 is 91156418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81465119 - 2²⁰ = 80416543 is a prime.

It is a super-2 number, since 2×81465119² = 13273131227368322, 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 (81465113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40732559 + 40732560.

It is an arithmetic number, because the mean of its divisors is an integer number (40732560).

Almost surely, 2^81465119 is an apocalyptic number.

81465119 is a deficient number, since it is larger than the sum of its proper divisors (1).

81465119 is an equidigital number, since it uses as much as digits as its factorization.

81465119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 81465119 is about 9025.8029559702. The cubic root of 81465119 is about 433.5014609273.

The spelling of 81465119 in words is "eighty-one million, four hundred sixty-five thousand, one hundred nineteen".