290305139 has 4 divisors (see below), whose sum is σ = 290355120. Its totient is φ = 290255160.

The previous prime is 290305121. The next prime is 290305157. The reversal of 290305139 is 931503092.

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

It is an interprime number because it is at equal distance from previous prime (290305121) and next prime (290305157).

It is a cyclic number.

It is not a de Polignac number, because 290305139 - 2¹² = 290301043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290305739) 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, 14927 + ... + 28344.

It is an arithmetic number, because the mean of its divisors is an integer number (72588780).

Almost surely, 2^290305139 is an apocalyptic number.

290305139 is a deficient number, since it is larger than the sum of its proper divisors (49981).

290305139 is an equidigital number, since it uses as much as digits as its factorization.

290305139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49980.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 290305139 is about 17038.3431999711. The cubic root of 290305139 is about 662.1426682956.

The spelling of 290305139 in words is "two hundred ninety million, three hundred five thousand, one hundred thirty-nine".