390003609 has 4 divisors (see below), whose sum is σ = 520004816. Its totient is φ = 260002404.

The previous prime is 390003547. The next prime is 390003611. The reversal of 390003609 is 906300093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 390003609 - 2¹¹ = 390001561 is a prime.

It is a super-3 number, since 3×390003609³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390003619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65000599 + ... + 65000604.

It is an arithmetic number, because the mean of its divisors is an integer number (130001204).

Almost surely, 2^390003609 is an apocalyptic number.

It is an amenable number.

390003609 is a deficient number, since it is larger than the sum of its proper divisors (130001207).

390003609 is a wasteful number, since it uses less digits than its factorization.

390003609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130001206.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 390003609 is about 19748.5090323295. The cubic root of 390003609 is about 730.6166110636.

The spelling of 390003609 in words is "three hundred ninety million, three thousand, six hundred nine".