810972429 has 4 divisors (see below), whose sum is σ = 1081296576. Its totient is φ = 540648284.

The previous prime is 810972419. The next prime is 810972473. The reversal of 810972429 is 924279018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 810972429 - 2⁵ = 810972397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810972419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135162069 + ... + 135162074.

It is an arithmetic number, because the mean of its divisors is an integer number (270324144).

Almost surely, 2^810972429 is an apocalyptic number.

It is an amenable number.

810972429 is a deficient number, since it is larger than the sum of its proper divisors (270324147).

810972429 is a wasteful number, since it uses less digits than its factorization.

810972429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270324146.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 810972429 is about 28477.5776533047. The cubic root of 810972429 is about 932.5426350758.

The spelling of 810972429 in words is "eight hundred ten million, nine hundred seventy-two thousand, four hundred twenty-nine".