1961934971 has 2 divisors, whose sum is σ = 1961934972. Its totient is φ = 1961934970.

The previous prime is 1961934943. The next prime is 1961935033. The reversal of 1961934971 is 1794391691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1961934971 - 2⁶ = 1961934907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1961934571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980967485 + 980967486.

It is an arithmetic number, because the mean of its divisors is an integer number (980967486).

Almost surely, 2^1961934971 is an apocalyptic number.

1961934971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961934971 is an equidigital number, since it uses as much as digits as its factorization.

1961934971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 1961934971 is about 44293.7351213464. The cubic root of 1961934971 is about 1251.8766416430.

The spelling of 1961934971 in words is "one billion, nine hundred sixty-one million, nine hundred thirty-four thousand, nine hundred seventy-one".