1640712023 has 2 divisors, whose sum is σ = 1640712024. Its totient is φ = 1640712022.

The previous prime is 1640712001. The next prime is 1640712067. The reversal of 1640712023 is 3202170461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640712023 - 2²² = 1636517719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640711983 and 1640712001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640712923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820356011 + 820356012.

It is an arithmetic number, because the mean of its divisors is an integer number (820356012).

Almost surely, 2^1640712023 is an apocalyptic number.

1640712023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640712023 is an equidigital number, since it uses as much as digits as its factorization.

1640712023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1640712023 is about 40505.7035860383. The cubic root of 1640712023 is about 1179.4443479363. Note that the first 3 decimals are identical.

Adding to 1640712023 its reverse (3202170461), we get a palindrome (4842882484).

The spelling of 1640712023 in words is "one billion, six hundred forty million, seven hundred twelve thousand, twenty-three".