1961088919 has 2 divisors, whose sum is σ = 1961088920. Its totient is φ = 1961088918.

The previous prime is 1961088901. The next prime is 1961088931. The reversal of 1961088919 is 9198801691.

It is a strong prime.

It is an emirp because it is prime and its reverse (9198801691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961088919 - 2⁵ = 1961088887 is a prime.

It is a super-2 number, since 2×1961088919² = 7691739496449177122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961088949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980544459 + 980544460.

It is an arithmetic number, because the mean of its divisors is an integer number (980544460).

Almost surely, 2^1961088919 is an apocalyptic number.

1961088919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961088919 is an equidigital number, since it uses as much as digits as its factorization.

1961088919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 52.

The square root of 1961088919 is about 44284.1836212434. The cubic root of 1961088919 is about 1251.6966654059.

The spelling of 1961088919 in words is "one billion, nine hundred sixty-one million, eighty-eight thousand, nine hundred nineteen".