290689693 has 4 divisors (see below), whose sum is σ = 332216800. Its totient is φ = 249162588.

The previous prime is 290689687. The next prime is 290689703. The reversal of 290689693 is 396986092.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 290689693 - 2⁵ = 290689661 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 290689693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290689603) 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, 20763543 + ... + 20763556.

It is an arithmetic number, because the mean of its divisors is an integer number (83054200).

Almost surely, 2^290689693 is an apocalyptic number.

It is an amenable number.

290689693 is a deficient number, since it is larger than the sum of its proper divisors (41527107).

290689693 is an equidigital number, since it uses as much as digits as its factorization.

290689693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41527106.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 290689693 is about 17049.6244240159. The cubic root of 290689693 is about 662.4349093758.

The spelling of 290689693 in words is "two hundred ninety million, six hundred eighty-nine thousand, six hundred ninety-three".