81450119 has 2 divisors, whose sum is σ = 81450120. Its totient is φ = 81450118.

The previous prime is 81450073. The next prime is 81450139. The reversal of 81450119 is 91105418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81450119 - 2¹² = 81446023 is a prime.

It is a super-2 number, since 2×81450119² = 13268243770228322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81450091 and 81450100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81450139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40725059 + 40725060.

It is an arithmetic number, because the mean of its divisors is an integer number (40725060).

Almost surely, 2^81450119 is an apocalyptic number.

81450119 is a deficient number, since it is larger than the sum of its proper divisors (1).

81450119 is an equidigital number, since it uses as much as digits as its factorization.

81450119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 81450119 is about 9024.9719667155. The cubic root of 81450119 is about 433.4748527252.

The spelling of 81450119 in words is "eighty-one million, four hundred fifty thousand, one hundred nineteen".