1961372837 has 2 divisors, whose sum is σ = 1961372838. Its totient is φ = 1961372836.

The previous prime is 1961372827. The next prime is 1961372851. The reversal of 1961372837 is 7382731691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1049695201 + 911677636 = 32399^2 + 30194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961372837 - 2¹⁶ = 1961307301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961372791 and 1961372800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961372827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980686418 + 980686419.

It is an arithmetic number, because the mean of its divisors is an integer number (980686419).

Almost surely, 2^1961372837 is an apocalyptic number.

It is an amenable number.

1961372837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961372837 is an equidigital number, since it uses as much as digits as its factorization.

1961372837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 1961372837 is about 44287.3891418313. The cubic root of 1961372837 is about 1251.7570675736.

The spelling of 1961372837 in words is "one billion, nine hundred sixty-one million, three hundred seventy-two thousand, eight hundred thirty-seven".