7190891489 has 4 divisors (see below), whose sum is σ = 7613885124. Its totient is φ = 6767897856.

The previous prime is 7190891473. The next prime is 7190891581. The reversal of 7190891489 is 9841980917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9841980917 = 809 ⋅12165613.

It can be written as a sum of positive squares in 2 ways, for example, as 3565045264 + 3625846225 = 59708^2 + 60215^2 .

It is a cyclic number.

It is not a de Polignac number, because 7190891489 - 2⁴ = 7190891473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7190891089) 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 in 3 ways as a sum of consecutive naturals, for example, 211496792 + ... + 211496825.

It is an arithmetic number, because the mean of its divisors is an integer number (1903471281).

Almost surely, 2^7190891489 is an apocalyptic number.

It is an amenable number.

7190891489 is a deficient number, since it is larger than the sum of its proper divisors (422993635).

7190891489 is a wasteful number, since it uses less digits than its factorization.

7190891489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422993634.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The square root of 7190891489 is about 84799.1243409978. The cubic root of 7190891489 is about 1930.1641505348.

The spelling of 7190891489 in words is "seven billion, one hundred ninety million, eight hundred ninety-one thousand, four hundred eighty-nine".