390829213 has 4 divisors (see below), whose sum is σ = 390870940. Its totient is φ = 390787488.

The previous prime is 390829211. The next prime is 390829217. The reversal of 390829213 is 312928093.

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 2 ways, for example, as 294534244 + 96294969 = 17162^2 + 9813^2 .

It is a cyclic number.

It is not a de Polignac number, because 390829213 - 2¹ = 390829211 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 (390829211) 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, 433 + ... + 27961.

It is an arithmetic number, because the mean of its divisors is an integer number (97717735).

Almost surely, 2^390829213 is an apocalyptic number.

It is an amenable number.

390829213 is a deficient number, since it is larger than the sum of its proper divisors (41727).

390829213 is a wasteful number, since it uses less digits than its factorization.

390829213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41726.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 390829213 is about 19769.4009266847. The cubic root of 390829213 is about 731.1317984805.

The spelling of 390829213 in words is "three hundred ninety million, eight hundred twenty-nine thousand, two hundred thirteen".