16141781 has 2 divisors, whose sum is σ = 16141782. Its totient is φ = 16141780.

The previous prime is 16141747. The next prime is 16141787. The reversal of 16141781 is 18714161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 7789681 = 2890^2 + 2791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16141781 is a prime.

It is a super-2 number, since 2×16141781² = 521114187703922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16141787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8070890 + 8070891.

It is an arithmetic number, because the mean of its divisors is an integer number (8070891).

Almost surely, 2^16141781 is an apocalyptic number.

It is an amenable number.

16141781 is a deficient number, since it is larger than the sum of its proper divisors (1).

16141781 is an equidigital number, since it uses as much as digits as its factorization.

16141781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 16141781 is about 4017.6835365668. The cubic root of 16141781 is about 252.7263258462.

The spelling of 16141781 in words is "sixteen million, one hundred forty-one thousand, seven hundred eighty-one".