1961044357 has 2 divisors, whose sum is σ = 1961044358. Its totient is φ = 1961044356.

The previous prime is 1961044343. The next prime is 1961044433. The reversal of 1961044357 is 7534401691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1950193921 + 10850436 = 44161^2 + 3294^2 .

It is an emirp because it is prime and its reverse (7534401691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961044357 - 2¹⁵ = 1961011589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961044157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980522178 + 980522179.

It is an arithmetic number, because the mean of its divisors is an integer number (980522179).

Almost surely, 2^1961044357 is an apocalyptic number.

It is an amenable number.

1961044357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961044357 is an equidigital number, since it uses as much as digits as its factorization.

1961044357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1961044357 is about 44283.6804816402. The cubic root of 1961044357 is about 1251.6871845288.

The spelling of 1961044357 in words is "one billion, nine hundred sixty-one million, forty-four thousand, three hundred fifty-seven".