1981950827 has 2 divisors, whose sum is σ = 1981950828. Its totient is φ = 1981950826.

The previous prime is 1981950809. The next prime is 1981950853. The reversal of 1981950827 is 7280591891.

It is a weak prime.

It is an emirp because it is prime and its reverse (7280591891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1981950827 - 2¹⁶ = 1981885291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1981950427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990975413 + 990975414.

It is an arithmetic number, because the mean of its divisors is an integer number (990975414).

Almost surely, 2^1981950827 is an apocalyptic number.

1981950827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1981950827 is an equidigital number, since it uses as much as digits as its factorization.

1981950827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1981950827 is about 44519.1063140311. The cubic root of 1981950827 is about 1256.1195022255.

The spelling of 1981950827 in words is "one billion, nine hundred eighty-one million, nine hundred fifty thousand, eight hundred twenty-seven".