291994949 has 2 divisors, whose sum is σ = 291994950. Its totient is φ = 291994948.

The previous prime is 291994943. The next prime is 291994993. The reversal of 291994949 is 949499192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211120900 + 80874049 = 14530^2 + 8993^2 .

It is a cyclic number.

It is not a de Polignac number, because 291994949 - 2⁸ = 291994693 is a prime.

It is a super-2 number, since 2×291994949² = 170522100483025202, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 291994894 and 291994903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291994943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145997474 + 145997475.

It is an arithmetic number, because the mean of its divisors is an integer number (145997475).

Almost surely, 2^291994949 is an apocalyptic number.

It is an amenable number.

291994949 is a deficient number, since it is larger than the sum of its proper divisors (1).

291994949 is an equidigital number, since it uses as much as digits as its factorization.

291994949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 56.

The square root of 291994949 is about 17087.8596962873. The cubic root of 291994949 is about 663.4249183467.

The spelling of 291994949 in words is "two hundred ninety-one million, nine hundred ninety-four thousand, nine hundred forty-nine".