739676809 has 3 divisors (see below), whose sum is σ = 739704007. Its totient is φ = 739649612.

The previous prime is 739676801. The next prime is 739676843. The reversal of 739676809 is 908676937.

The square root of 739676809 is 27197.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 409455225 + 330221584 = 20235^2 + 18172^2 .

It is not a de Polignac number, because 739676809 - 2³ = 739676801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 739676809.

It is not an unprimeable number, because it can be changed into a prime (739676801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13599 + ... + 40795.

Almost surely, 2^739676809 is an apocalyptic number.

739676809 is the 27197-th square number.

739676809 is the 13599-th centered octagonal number.

It is an amenable number.

739676809 is a deficient number, since it is larger than the sum of its proper divisors (27198).

739676809 is an frugal number, since it uses more digits than its factorization.

739676809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54394 (or 27197 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 55.

The cubic root of 739676809 is about 904.3724713740.

The spelling of 739676809 in words is "seven hundred thirty-nine million, six hundred seventy-six thousand, eight hundred nine".