1964889139 has 2 divisors, whose sum is σ = 1964889140. Its totient is φ = 1964889138.

The previous prime is 1964889109. The next prime is 1964889163. The reversal of 1964889139 is 9319884691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1964889139 - 2¹³ = 1964880947 is a prime.

It is a super-2 number, since 2×1964889139² = 7721578657120322642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1964889109) 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, 982444569 + 982444570.

It is an arithmetic number, because the mean of its divisors is an integer number (982444570).

Almost surely, 2^1964889139 is an apocalyptic number.

1964889139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964889139 is an equidigital number, since it uses as much as digits as its factorization.

1964889139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 58.

The square root of 1964889139 is about 44327.0700475454. The cubic root of 1964889139 is about 1252.5046609734.

The spelling of 1964889139 in words is "one billion, nine hundred sixty-four million, eight hundred eighty-nine thousand, one hundred thirty-nine".