81341492 has 12 divisors (see below), whose sum is σ = 142813440. Its totient is φ = 40537656.

The previous prime is 81341479. The next prime is 81341521. The reversal of 81341492 is 29414318.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31892 + ... + 34347.

It is an arithmetic number, because the mean of its divisors is an integer number (11901120).

Almost surely, 2^81341492 is an apocalyptic number.

It is an amenable number.

81341492 is a deficient number, since it is larger than the sum of its proper divisors (61471948).

81341492 is a wasteful number, since it uses less digits than its factorization.

81341492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66550 (or 66548 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 81341492 is about 9018.9518237986. The cubic root of 81341492 is about 433.2820638883.

The spelling of 81341492 in words is "eighty-one million, three hundred forty-one thousand, four hundred ninety-two".