16506937 has 2 divisors, whose sum is σ = 16506938. Its totient is φ = 16506936.

The previous prime is 16506923. The next prime is 16506943. The reversal of 16506937 is 73960561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14107536 + 2399401 = 3756^2 + 1549^2 .

It is an emirp because it is prime and its reverse (73960561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16506937 - 2²³ = 8118329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16506896 and 16506905.

It is not a weakly prime, because it can be changed into another prime (16506907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253468 + 8253469.

It is an arithmetic number, because the mean of its divisors is an integer number (8253469).

Almost surely, 2^16506937 is an apocalyptic number.

It is an amenable number.

16506937 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506937 is an equidigital number, since it uses as much as digits as its factorization.

16506937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 16506937 is about 4062.8729982612. The cubic root of 16506937 is about 254.6178409894.

The spelling of 16506937 in words is "sixteen million, five hundred six thousand, nine hundred thirty-seven".