1961039071 has 2 divisors, whose sum is σ = 1961039072. Its totient is φ = 1961039070.

The previous prime is 1961039057. The next prime is 1961039081. The reversal of 1961039071 is 1709301691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1961039071 - 2¹³ = 1961030879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1961039071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961039011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980519535 + 980519536.

It is an arithmetic number, because the mean of its divisors is an integer number (980519536).

Almost surely, 2^1961039071 is an apocalyptic number.

1961039071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961039071 is an equidigital number, since it uses as much as digits as its factorization.

1961039071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 1961039071 is about 44283.6207982139. The cubic root of 1961039071 is about 1251.6860598858.

The spelling of 1961039071 in words is "one billion, nine hundred sixty-one million, thirty-nine thousand, seventy-one".