16761961 has 2 divisors, whose sum is σ = 16761962. Its totient is φ = 16761960.

The previous prime is 16761929. The next prime is 16761973. The reversal of 16761961 is 16916761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11943936 + 4818025 = 3456^2 + 2195^2 .

It is an emirp because it is prime and its reverse (16916761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16761961 - 2⁵ = 16761929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16761961.

It is not a weakly prime, because it can be changed into another prime (16761061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8380980 + 8380981.

It is an arithmetic number, because the mean of its divisors is an integer number (8380981).

Almost surely, 2^16761961 is an apocalyptic number.

It is an amenable number.

16761961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16761961 is an equidigital number, since it uses as much as digits as its factorization.

16761961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 16761961 is about 4094.1373938841. The cubic root of 16761961 is about 255.9223855287.

It can be divided in two parts, 167 and 61961, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 16761961 in words is "sixteen million, seven hundred sixty-one thousand, nine hundred sixty-one".