16249669 has 2 divisors, whose sum is σ = 16249670. Its totient is φ = 16249668.

The previous prime is 16249643. The next prime is 16249679. The reversal of 16249669 is 96694261.

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., 11985444 + 4264225 = 3462^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 16249669 - 2⁹ = 16249157 is a prime.

It is a super-2 number, since 2×16249669² = 528103485219122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16249609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8124834 + 8124835.

It is an arithmetic number, because the mean of its divisors is an integer number (8124835).

Almost surely, 2^16249669 is an apocalyptic number.

It is an amenable number.

16249669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16249669 is an equidigital number, since it uses as much as digits as its factorization.

16249669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 16249669 is about 4031.0878184431. The cubic root of 16249669 is about 253.2881311702.

The spelling of 16249669 in words is "sixteen million, two hundred forty-nine thousand, six hundred sixty-nine".