15978341 has 2 divisors, whose sum is σ = 15978342. Its totient is φ = 15978340.

The previous prime is 15978323. The next prime is 15978371. The reversal of 15978341 is 14387951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15249025 + 729316 = 3905^2 + 854^2 .

It is a cyclic number.

It is not a de Polignac number, because 15978341 - 2²² = 11784037 is a prime.

It is a super-2 number, since 2×15978341² = 510614762224562, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15978295 and 15978304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15978311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7989170 + 7989171.

It is an arithmetic number, because the mean of its divisors is an integer number (7989171).

Almost surely, 2^15978341 is an apocalyptic number.

It is an amenable number.

15978341 is a deficient number, since it is larger than the sum of its proper divisors (1).

15978341 is an equidigital number, since it uses as much as digits as its factorization.

15978341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 15978341 is about 3997.2917081444. The cubic root of 15978341 is about 251.8704560093.

The spelling of 15978341 in words is "fifteen million, nine hundred seventy-eight thousand, three hundred forty-one".