373661 has 2 divisors, whose sum is σ = 373662. Its totient is φ = 373660.

The previous prime is 373657. The next prime is 373669. The reversal of 373661 is 166373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337561 + 36100 = 581^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 373661 - 2² = 373657 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 373661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (373669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186830 + 186831.

It is an arithmetic number, because the mean of its divisors is an integer number (186831).

2³⁷³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

373661 is a deficient number, since it is larger than the sum of its proper divisors (1).

373661 is an equidigital number, since it uses as much as digits as its factorization.

373661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 26.

The square root of 373661 is about 611.2781690851. The cubic root of 373661 is about 72.0265462812.

The spelling of 373661 in words is "three hundred seventy-three thousand, six hundred sixty-one".