181413629 has 2 divisors, whose sum is σ = 181413630. Its totient is φ = 181413628.

The previous prime is 181413611. The next prime is 181413697. The reversal of 181413629 is 926314181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118766404 + 62647225 = 10898^2 + 7915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181413629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181416629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90706814 + 90706815.

It is an arithmetic number, because the mean of its divisors is an integer number (90706815).

Almost surely, 2^181413629 is an apocalyptic number.

It is an amenable number.

181413629 is a deficient number, since it is larger than the sum of its proper divisors (1).

181413629 is an equidigital number, since it uses as much as digits as its factorization.

181413629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 181413629 is about 13468.9876753971. The cubic root of 181413629 is about 566.0958489925.

The spelling of 181413629 in words is "one hundred eighty-one million, four hundred thirteen thousand, six hundred twenty-nine".