206972429 has 4 divisors (see below), whose sum is σ = 207132576. Its totient is φ = 206812284.

The previous prime is 206972419. The next prime is 206972483. The reversal of 206972429 is 924279602.

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 a de Polignac number, because none of the positive numbers 2^k-206972429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206972419) 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, 78119 + ... + 80724.

It is an arithmetic number, because the mean of its divisors is an integer number (51783144).

Almost surely, 2^206972429 is an apocalyptic number.

It is an amenable number.

206972429 is a deficient number, since it is larger than the sum of its proper divisors (160147).

206972429 is a wasteful number, since it uses less digits than its factorization.

206972429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160146.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 206972429 is about 14386.5363795460. The cubic root of 206972429 is about 591.5219053988.

The spelling of 206972429 in words is "two hundred six million, nine hundred seventy-two thousand, four hundred twenty-nine".