81190629 has 24 divisors (see below), whose sum is σ = 132947360. Its totient is φ = 47332512.

The previous prime is 81190609. The next prime is 81190631. The reversal of 81190629 is 92609118.

It is not a de Polignac number, because 81190629 - 2¹¹ = 81188581 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81190593 and 81190602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81190609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16039 + ... + 20484.

Almost surely, 2^81190629 is an apocalyptic number.

It is an amenable number.

81190629 is a deficient number, since it is larger than the sum of its proper divisors (51756731).

81190629 is a wasteful number, since it uses less digits than its factorization.

81190629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36561 (or 36558 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 81190629 is about 9010.5842762831. The cubic root of 81190629 is about 433.0140305907.

The spelling of 81190629 in words is "eighty-one million, one hundred ninety thousand, six hundred twenty-nine".