720145529 has 2 divisors, whose sum is σ = 720145530. Its totient is φ = 720145528.

The previous prime is 720145507. The next prime is 720145537. The reversal of 720145529 is 925541027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593019904 + 127125625 = 24352^2 + 11275^2 .

It is an emirp because it is prime and its reverse (925541027) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720145529 is a prime.

It is not a weakly prime, because it can be changed into another prime (720145579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360072764 + 360072765.

It is an arithmetic number, because the mean of its divisors is an integer number (360072765).

Almost surely, 2^720145529 is an apocalyptic number.

It is an amenable number.

720145529 is a deficient number, since it is larger than the sum of its proper divisors (1).

720145529 is an equidigital number, since it uses as much as digits as its factorization.

720145529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 720145529 is about 26835.5273657888. The cubic root of 720145529 is about 896.3413317574.

The spelling of 720145529 in words is "seven hundred twenty million, one hundred forty-five thousand, five hundred twenty-nine".