290743993 has 4 divisors (see below), whose sum is σ = 291406720. Its totient is φ = 290081268.

The previous prime is 290743991. The next prime is 290744011. The reversal of 290743993 is 399347092.

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 290743993 - 2¹ = 290743991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290743991) 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, 330705 + ... + 331582.

It is an arithmetic number, because the mean of its divisors is an integer number (72851680).

Almost surely, 2^290743993 is an apocalyptic number.

It is an amenable number.

290743993 is a deficient number, since it is larger than the sum of its proper divisors (662727).

290743993 is an equidigital number, since it uses as much as digits as its factorization.

290743993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662726.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 290743993 is about 17051.2167601025. The cubic root of 290743993 is about 662.4761537875.

The spelling of 290743993 in words is "two hundred ninety million, seven hundred forty-three thousand, nine hundred ninety-three".