16401937 has 2 divisors, whose sum is σ = 16401938. Its totient is φ = 16401936.

The previous prime is 16401911. The next prime is 16401943. The reversal of 16401937 is 73910461.

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., 14753281 + 1648656 = 3841^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 16401937 - 2⁷ = 16401809 is a prime.

It is a super-3 number, since 3×16401937³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16401899 and 16401908.

It is not a weakly prime, because it can be changed into another prime (16401977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200968 + 8200969.

It is an arithmetic number, because the mean of its divisors is an integer number (8200969).

Almost surely, 2^16401937 is an apocalyptic number.

It is an amenable number.

16401937 is a deficient number, since it is larger than the sum of its proper divisors (1).

16401937 is an equidigital number, since it uses as much as digits as its factorization.

16401937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 16401937 is about 4049.9304932307. The cubic root of 16401937 is about 254.0768207507.

The spelling of 16401937 in words is "sixteen million, four hundred one thousand, nine hundred thirty-seven".