15990983 has 2 divisors, whose sum is σ = 15990984. Its totient is φ = 15990982.

The previous prime is 15990973. The next prime is 15991007. The reversal of 15990983 is 38909951.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15990983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15990973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7995491 + 7995492.

It is an arithmetic number, because the mean of its divisors is an integer number (7995492).

Almost surely, 2^15990983 is an apocalyptic number.

15990983 is a deficient number, since it is larger than the sum of its proper divisors (1).

15990983 is an equidigital number, since it uses as much as digits as its factorization.

15990983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 15990983 is about 3998.8727161539. The cubic root of 15990983 is about 251.9368648001.

The spelling of 15990983 in words is "fifteen million, nine hundred ninety thousand, nine hundred eighty-three".