16972429 has 2 divisors, whose sum is σ = 16972430. Its totient is φ = 16972428.

The previous prime is 16972391. The next prime is 16972463. The reversal of 16972429 is 92427961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 39204 = 4115^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 16972429 - 2¹³ = 16964237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16972391 and 16972400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16972489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486214 + 8486215.

It is an arithmetic number, because the mean of its divisors is an integer number (8486215).

Almost surely, 2^16972429 is an apocalyptic number.

It is an amenable number.

16972429 is a deficient number, since it is larger than the sum of its proper divisors (1).

16972429 is an equidigital number, since it uses as much as digits as its factorization.

16972429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 16972429 is about 4119.7607940268. The cubic root of 16972429 is about 256.9890783511.

The spelling of 16972429 in words is "sixteen million, nine hundred seventy-two thousand, four hundred twenty-nine".