740812189 has 4 divisors (see below), whose sum is σ = 797797756. Its totient is φ = 683826624.

The previous prime is 740812181. The next prime is 740812207. The reversal of 740812189 is 981218047.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981218047 = 587 ⋅1671581.

It can be written as a sum of positive squares in 2 ways, for example, as 265136089 + 475676100 = 16283^2 + 21810^2 .

It is not a de Polignac number, because 740812189 - 2³ = 740812181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740812181) 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, 28492764 + ... + 28492789.

It is an arithmetic number, because the mean of its divisors is an integer number (199449439).

Almost surely, 2^740812189 is an apocalyptic number.

It is an amenable number.

740812189 is a deficient number, since it is larger than the sum of its proper divisors (56985567).

740812189 is a wasteful number, since it uses less digits than its factorization.

740812189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56985566.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 740812189 is about 27217.8652542774. The cubic root of 740812189 is about 904.8349623251.

The spelling of 740812189 in words is "seven hundred forty million, eight hundred twelve thousand, one hundred eighty-nine".