1961013311 has 2 divisors, whose sum is σ = 1961013312. Its totient is φ = 1961013310.

The previous prime is 1961013269. The next prime is 1961013317. The reversal of 1961013311 is 1133101691.

It is a strong prime.

It is an emirp because it is prime and its reverse (1133101691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961013311 - 2²⁶ = 1893904447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961013317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980506655 + 980506656.

It is an arithmetic number, because the mean of its divisors is an integer number (980506656).

Almost surely, 2^1961013311 is an apocalyptic number.

1961013311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961013311 is an equidigital number, since it uses as much as digits as its factorization.

1961013311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1961013311 is about 44283.3299447998. The cubic root of 1961013311 is about 1251.6805791903.

The spelling of 1961013311 in words is "one billion, nine hundred sixty-one million, thirteen thousand, three hundred eleven".