290969381 has 4 divisors (see below), whose sum is σ = 291917472. Its totient is φ = 290021292.

The previous prime is 290969359. The next prime is 290969407. The reversal of 290969381 is 183969092.

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 a de Polignac number, because none of the positive numbers 2^k-290969381 is a prime.

It is a super-2 number, since 2×290969381² = 169326361359046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290969321) 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, 473585 + ... + 474198.

It is an arithmetic number, because the mean of its divisors is an integer number (72979368).

Almost surely, 2^290969381 is an apocalyptic number.

It is an amenable number.

290969381 is a deficient number, since it is larger than the sum of its proper divisors (948091).

290969381 is an equidigital number, since it uses as much as digits as its factorization.

290969381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948090.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 290969381 is about 17057.8246268391. The cubic root of 290969381 is about 662.6472958829.

The spelling of 290969381 in words is "two hundred ninety million, nine hundred sixty-nine thousand, three hundred eighty-one".