16431377 has 2 divisors, whose sum is σ = 16431378. Its totient is φ = 16431376.

The previous prime is 16431343. The next prime is 16431379. The reversal of 16431377 is 77313461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13868176 + 2563201 = 3724^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 16431377 - 2¹⁶ = 16365841 is a prime.

It is a super-2 number, since 2×16431377² = 539980300232258, which contains 22 as substring.

Together with 16431379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16431379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8215688 + 8215689.

It is an arithmetic number, because the mean of its divisors is an integer number (8215689).

Almost surely, 2^16431377 is an apocalyptic number.

It is an amenable number.

16431377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16431377 is an equidigital number, since it uses as much as digits as its factorization.

16431377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 32.

The square root of 16431377 is about 4053.5634940136. The cubic root of 16431377 is about 254.2287448952.

The spelling of 16431377 in words is "sixteen million, four hundred thirty-one thousand, three hundred seventy-seven".