290681693 has 8 divisors (see below), whose sum is σ = 296379768. Its totient is φ = 285030144.

The previous prime is 290681689. The next prime is 290681707. The reversal of 290681693 is 396186092.

It can be written as a sum of positive squares in 4 ways, for example, as 115304644 + 175377049 = 10738^2 + 13243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 290681693 - 2² = 290681689 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 (290681683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121 + ... + 24137.

It is an arithmetic number, because the mean of its divisors is an integer number (37047471).

Almost surely, 2^290681693 is an apocalyptic number.

It is an amenable number.

290681693 is a deficient number, since it is larger than the sum of its proper divisors (5698075).

290681693 is a wasteful number, since it uses less digits than its factorization.

290681693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23263.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 290681693 is about 17049.3898131282. The cubic root of 290681693 is about 662.4288324170.

The spelling of 290681693 in words is "two hundred ninety million, six hundred eighty-one thousand, six hundred ninety-three".