15794981 has 2 divisors, whose sum is σ = 15794982. Its totient is φ = 15794980.

The previous prime is 15794971. The next prime is 15794993. The reversal of 15794981 is 18949751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 5134756 = 3265^2 + 2266^2 .

It is an emirp because it is prime and its reverse (18949751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15794981 - 2⁶ = 15794917 is a prime.

It is a super-2 number, since 2×15794981² = 498962849580722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15794941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7897490 + 7897491.

It is an arithmetic number, because the mean of its divisors is an integer number (7897491).

Almost surely, 2^15794981 is an apocalyptic number.

It is an amenable number.

15794981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15794981 is an equidigital number, since it uses as much as digits as its factorization.

15794981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 15794981 is about 3974.2899994842. The cubic root of 15794981 is about 250.9032976161.

The spelling of 15794981 in words is "fifteen million, seven hundred ninety-four thousand, nine hundred eighty-one".