15980429 has 2 divisors, whose sum is σ = 15980430. Its totient is φ = 15980428.

The previous prime is 15980389. The next prime is 15980431. The reversal of 15980429 is 92408951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14455204 + 1525225 = 3802^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 15980429 - 2¹² = 15976333 is a prime.

It is a super-2 number, since 2×15980429² = 510748222048082, which contains 22 as substring.

Together with 15980431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15980392 and 15980401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15980449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7990214 + 7990215.

It is an arithmetic number, because the mean of its divisors is an integer number (7990215).

Almost surely, 2^15980429 is an apocalyptic number.

It is an amenable number.

15980429 is a deficient number, since it is larger than the sum of its proper divisors (1).

15980429 is an equidigital number, since it uses as much as digits as its factorization.

15980429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 15980429 is about 3997.5528764483. The cubic root of 15980429 is about 251.8814267479.

The spelling of 15980429 in words is "fifteen million, nine hundred eighty thousand, four hundred twenty-nine".