1982190031 has 2 divisors, whose sum is σ = 1982190032. Its totient is φ = 1982190030.

The previous prime is 1982190013. The next prime is 1982190083. The reversal of 1982190031 is 1300912891.

Together with previous prime (1982190013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1982190031 - 2¹¹ = 1982187983 is a prime.

It is a super-2 number, since 2×1982190031² = 7858154637991561922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982190131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991095015 + 991095016.

It is an arithmetic number, because the mean of its divisors is an integer number (991095016).

Almost surely, 2^1982190031 is an apocalyptic number.

1982190031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982190031 is an equidigital number, since it uses as much as digits as its factorization.

1982190031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1982190031 is about 44521.7927648921. The cubic root of 1982190031 is about 1256.1700343776.

The spelling of 1982190031 in words is "one billion, nine hundred eighty-two million, one hundred ninety thousand, thirty-one".