291480139 has 2 divisors, whose sum is σ = 291480140. Its totient is φ = 291480138.

The previous prime is 291480107. The next prime is 291480151. The reversal of 291480139 is 931084192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291480139 - 2⁵ = 291480107 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 291480098 and 291480107.

It is not a weakly prime, because it can be changed into another prime (291480169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145740069 + 145740070.

It is an arithmetic number, because the mean of its divisors is an integer number (145740070).

Almost surely, 2^291480139 is an apocalyptic number.

291480139 is a deficient number, since it is larger than the sum of its proper divisors (1).

291480139 is an equidigital number, since it uses as much as digits as its factorization.

291480139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 291480139 is about 17072.7894323101. The cubic root of 291480139 is about 663.0347989291.

The spelling of 291480139 in words is "two hundred ninety-one million, four hundred eighty thousand, one hundred thirty-nine".