181494743 has 2 divisors, whose sum is σ = 181494744. Its totient is φ = 181494742.

The previous prime is 181494697. The next prime is 181494751. The reversal of 181494743 is 347494181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181494743 - 2⁸ = 181494487 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 181494743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181494793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90747371 + 90747372.

It is an arithmetic number, because the mean of its divisors is an integer number (90747372).

Almost surely, 2^181494743 is an apocalyptic number.

181494743 is a deficient number, since it is larger than the sum of its proper divisors (1).

181494743 is an equidigital number, since it uses as much as digits as its factorization.

181494743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 181494743 is about 13471.9984783253. The cubic root of 181494743 is about 566.1802076980.

Adding to 181494743 its sum of digits (41), we get a square (181494784 = 13472²).

The spelling of 181494743 in words is "one hundred eighty-one million, four hundred ninety-four thousand, seven hundred forty-three".