1027621727939 has 2 divisors, whose sum is σ = 1027621727940. Its totient is φ = 1027621727938.

The previous prime is 1027621727927. The next prime is 1027621727947. The reversal of 1027621727939 is 9397271267201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027621727939 is a prime.

It is a super-2 number, since 2×1027621727939² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1027621724939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513810863969 + 513810863970.

It is an arithmetic number, because the mean of its divisors is an integer number (513810863970).

Almost surely, 2^{1027621727939} is an apocalyptic number.

1027621727939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027621727939 is an equidigital number, since it uses as much as digits as its factorization.

1027621727939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The spelling of 1027621727939 in words is "one trillion, twenty-seven billion, six hundred twenty-one million, seven hundred twenty-seven thousand, nine hundred thirty-nine".