1921962131 has 2 divisors, whose sum is σ = 1921962132. Its totient is φ = 1921962130.

The previous prime is 1921962121. The next prime is 1921962167. The reversal of 1921962131 is 1312691291.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1921962131 is a prime.

It is a super-2 number, since 2×1921962131² = 7387876865996122322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1921962091 and 1921962100.

It is not a weakly prime, because it can be changed into another prime (1921962101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960981065 + 960981066.

It is an arithmetic number, because the mean of its divisors is an integer number (960981066).

Almost surely, 2^1921962131 is an apocalyptic number.

1921962131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921962131 is an equidigital number, since it uses as much as digits as its factorization.

1921962131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 35.

The square root of 1921962131 is about 43840.1885374596. The cubic root of 1921962131 is about 1243.3162469331.

The spelling of 1921962131 in words is "one billion, nine hundred twenty-one million, nine hundred sixty-two thousand, one hundred thirty-one".