597640309 has 12 divisors (see below), whose sum is σ = 695666988. Its totient is φ = 511929600.

The previous prime is 597640291. The next prime is 597640319. The reversal of 597640309 is 903046795.

It can be written as a sum of positive squares in 2 ways, for example, as 248062500 + 349577809 = 15750^2 + 18697^2 .

It is not a de Polignac number, because 597640309 - 2¹³ = 597632117 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 (597640319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99039 + ... + 104899.

It is an arithmetic number, because the mean of its divisors is an integer number (57972249).

Almost surely, 2^597640309 is an apocalyptic number.

It is an amenable number.

597640309 is a deficient number, since it is larger than the sum of its proper divisors (98026679).

597640309 is a wasteful number, since it uses less digits than its factorization.

597640309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956 (or 7949 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 597640309 is about 24446.6829856322. The cubic root of 597640309 is about 842.3255234852.

The spelling of 597640309 in words is "five hundred ninety-seven million, six hundred forty thousand, three hundred nine".