291249601 has 4 divisors (see below), whose sum is σ = 293104852. Its totient is φ = 289394352.

The previous prime is 291249587. The next prime is 291249611. The reversal of 291249601 is 106942192.

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

It can be written as a sum of positive squares in 2 ways, for example, as 223203600 + 68046001 = 14940^2 + 8249^2 .

It is a cyclic number.

It is not a de Polignac number, because 291249601 - 2⁷ = 291249473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291249611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927390 + ... + 927703.

It is an arithmetic number, because the mean of its divisors is an integer number (73276213).

Almost surely, 2^291249601 is an apocalyptic number.

It is an amenable number.

291249601 is a deficient number, since it is larger than the sum of its proper divisors (1855251).

291249601 is a wasteful number, since it uses less digits than its factorization.

291249601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855250.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 291249601 is about 17066.0364759952. The cubic root of 291249601 is about 662.8599499286.

The spelling of 291249601 in words is "two hundred ninety-one million, two hundred forty-nine thousand, six hundred one".