16345961 has 2 divisors, whose sum is σ = 16345962. Its totient is φ = 16345960.

The previous prime is 16345957. The next prime is 16345981. The reversal of 16345961 is 16954361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16152361 + 193600 = 4019^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 16345961 - 2² = 16345957 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16345951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8172980 + 8172981.

It is an arithmetic number, because the mean of its divisors is an integer number (8172981).

Almost surely, 2^16345961 is an apocalyptic number.

It is an amenable number.

16345961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16345961 is an equidigital number, since it uses as much as digits as its factorization.

16345961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 16345961 is about 4043.0138510769. The cubic root of 16345961 is about 253.7874562712.

Subtracting 16345961 from its reverse (16954361), we obtain a square (608400 = 780²).

The spelling of 16345961 in words is "sixteen million, three hundred forty-five thousand, nine hundred sixty-one".