81094190 has 8 divisors (see below), whose sum is σ = 145969560. Its totient is φ = 32437672.

The previous prime is 81094177. The next prime is 81094201. The reversal of 81094190 is 9149018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81094190² = 13152535303512200, which contains 22 as substring.

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, 4054700 + ... + 4054719.

It is an arithmetic number, because the mean of its divisors is an integer number (18246195).

Almost surely, 2^81094190 is an apocalyptic number.

81094190 is a deficient number, since it is larger than the sum of its proper divisors (64875370).

81094190 is a wasteful number, since it uses less digits than its factorization.

81094190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8109426.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 81094190 is about 9005.2312574414. The cubic root of 81094190 is about 432.8425166052.

The spelling of 81094190 in words is "eighty-one million, ninety-four thousand, one hundred ninety".