81470119 has 12 divisors (see below), whose sum is σ = 86709504. Its totient is φ = 76531392.

The previous prime is 81470111. The next prime is 81470131. The reversal of 81470119 is 91107418.

It is not a de Polignac number, because 81470119 - 2³ = 81470111 is a prime.

It is a super-2 number, since 2×81470119² = 13274760579748322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81470111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44959 + ... + 46735.

It is an arithmetic number, because the mean of its divisors is an integer number (7225792).

Almost surely, 2^81470119 is an apocalyptic number.

81470119 is a deficient number, since it is larger than the sum of its proper divisors (5239385).

81470119 is a wasteful number, since it uses less digits than its factorization.

81470119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 81470119 is about 9026.0799353872. The cubic root of 81470119 is about 433.5103296022.

The spelling of 81470119 in words is "eighty-one million, four hundred seventy thousand, one hundred nineteen".