16865413 has 2 divisors, whose sum is σ = 16865414. Its totient is φ = 16865412.

The previous prime is 16865393. The next prime is 16865423. The reversal of 16865413 is 31456861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16378209 + 487204 = 4047^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 16865413 - 2²¹ = 14768261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16865423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432706 + 8432707.

It is an arithmetic number, because the mean of its divisors is an integer number (8432707).

Almost surely, 2^16865413 is an apocalyptic number.

It is an amenable number.

16865413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16865413 is an equidigital number, since it uses as much as digits as its factorization.

16865413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 16865413 is about 4106.7521230286. The cubic root of 16865413 is about 256.4478093500.

The spelling of 16865413 in words is "sixteen million, eight hundred sixty-five thousand, four hundred thirteen".