734520989 has 4 divisors (see below), whose sum is σ = 777728124. Its totient is φ = 691313856.

The previous prime is 734520973. The next prime is 734521013. The reversal of 734520989 is 989025437.

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: 989025437 = 59 ⋅16763143.

It can be written as a sum of positive squares in 2 ways, for example, as 290702500 + 443818489 = 17050^2 + 21067^2 .

It is a cyclic number.

It is not a de Polignac number, because 734520989 - 2⁴ = 734520973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (734520959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21603542 + ... + 21603575.

It is an arithmetic number, because the mean of its divisors is an integer number (194432031).

Almost surely, 2^734520989 is an apocalyptic number.

It is an amenable number.

734520989 is a deficient number, since it is larger than the sum of its proper divisors (43207135).

734520989 is a wasteful number, since it uses less digits than its factorization.

734520989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43207134.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 734520989 is about 27102.0476901654. The cubic root of 734520989 is about 902.2663003471.

The spelling of 734520989 in words is "seven hundred thirty-four million, five hundred twenty thousand, nine hundred eighty-nine".