1961366237 has 2 divisors, whose sum is σ = 1961366238. Its totient is φ = 1961366236.

The previous prime is 1961366227. The next prime is 1961366261. The reversal of 1961366237 is 7326631691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1126676356 + 834689881 = 33566^2 + 28891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961366237 - 2¹⁰ = 1961365213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961366207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980683118 + 980683119.

It is an arithmetic number, because the mean of its divisors is an integer number (980683119).

Almost surely, 2^1961366237 is an apocalyptic number.

It is an amenable number.

1961366237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961366237 is an equidigital number, since it uses as much as digits as its factorization.

1961366237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 1961366237 is about 44287.3146284577. The cubic root of 1961366237 is about 1251.7556635220.

The spelling of 1961366237 in words is "one billion, nine hundred sixty-one million, three hundred sixty-six thousand, two hundred thirty-seven".