1611961937 has 2 divisors, whose sum is σ = 1611961938. Its totient is φ = 1611961936.

The previous prime is 1611961907. The next prime is 1611961993. The reversal of 1611961937 is 7391691161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1611540736 + 421201 = 40144^2 + 649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611961937 - 2²⁶ = 1544853073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611961907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805980968 + 805980969.

It is an arithmetic number, because the mean of its divisors is an integer number (805980969).

Almost surely, 2^1611961937 is an apocalyptic number.

It is an amenable number.

1611961937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611961937 is an equidigital number, since it uses as much as digits as its factorization.

1611961937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 44.

The square root of 1611961937 is about 40149.2457837006. The cubic root of 1611961937 is about 1172.5146045586.

The spelling of 1611961937 in words is "one billion, six hundred eleven million, nine hundred sixty-one thousand, nine hundred thirty-seven".