291048481 has 2 divisors, whose sum is σ = 291048482. Its totient is φ = 291048480.

The previous prime is 291048431. The next prime is 291048503. The reversal of 291048481 is 184840192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289306081 + 1742400 = 17009^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 291048481 - 2¹⁵ = 291015713 is a prime.

It is a super-2 number, since 2×291048481² = 169418436584814722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 291048481.

It is not a weakly prime, because it can be changed into another prime (291048431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145524240 + 145524241.

It is an arithmetic number, because the mean of its divisors is an integer number (145524241).

Almost surely, 2^291048481 is an apocalyptic number.

It is an amenable number.

291048481 is a deficient number, since it is larger than the sum of its proper divisors (1).

291048481 is an equidigital number, since it uses as much as digits as its factorization.

291048481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 291048481 is about 17060.1430533275. The cubic root of 291048481 is about 662.7073373117.

The spelling of 291048481 in words is "two hundred ninety-one million, forty-eight thousand, four hundred eighty-one".