290968421 has 4 divisors (see below), whose sum is σ = 291025644. Its totient is φ = 290911200.

The previous prime is 290968411. The next prime is 290968439. The reversal of 290968421 is 124869092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139948900 + 151019521 = 11830^2 + 12289^2 .

It is a cyclic number.

It is not a de Polignac number, because 290968421 - 2¹⁴ = 290952037 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 (290968411) 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, 20150 + ... + 31431.

It is an arithmetic number, because the mean of its divisors is an integer number (72756411).

Almost surely, 2^290968421 is an apocalyptic number.

It is an amenable number.

290968421 is a deficient number, since it is larger than the sum of its proper divisors (57223).

290968421 is an equidigital number, since it uses as much as digits as its factorization.

290968421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57222.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 290968421 is about 17057.7964872371. The cubic root of 290968421 is about 662.6465671211.

The spelling of 290968421 in words is "two hundred ninety million, nine hundred sixty-eight thousand, four hundred twenty-one".