181370994 has 32 divisors (see below), whose sum is σ = 438950016. Its totient is φ = 48771840.

The previous prime is 181370963. The next prime is 181370999. The reversal of 181370994 is 499073181.

It is a happy number.

181370994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181370999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126297 + ... + 127724.

It is an arithmetic number, because the mean of its divisors is an integer number (13717188).

Almost surely, 2^181370994 is an apocalyptic number.

181370994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

181370994 is an abundant number, since it is smaller than the sum of its proper divisors (257579022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181370994 is a wasteful number, since it uses less digits than its factorization.

181370994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254050.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 181370994 is about 13467.4048725061. The cubic root of 181370994 is about 566.0514984336.

The spelling of 181370994 in words is "one hundred eighty-one million, three hundred seventy thousand, nine hundred ninety-four".