7290139 has 4 divisors (see below), whose sum is σ = 7378056. Its totient is φ = 7202224.

The previous prime is 7290121. The next prime is 7290187. The reversal of 7290139 is 9310927.

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

It is a cyclic number.

It is not a de Polignac number, because 7290139 - 2¹³ = 7281947 is a prime.

It is a super-2 number, since 2×7290139² = 106292253278642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7290139.

It is not an unprimeable number, because it can be changed into a prime (7290119) 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, 43834 + ... + 43999.

It is an arithmetic number, because the mean of its divisors is an integer number (1844514).

Almost surely, 2^7290139 is an apocalyptic number.

7290139 is a deficient number, since it is larger than the sum of its proper divisors (87917).

7290139 is an equidigital number, since it uses as much as digits as its factorization.

7290139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87916.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 7290139 is about 2700.0257406180. The cubic root of 7290139 is about 193.9003544671.

The spelling of 7290139 in words is "seven million, two hundred ninety thousand, one hundred thirty-nine".