291996469 has 2 divisors, whose sum is σ = 291996470. Its totient is φ = 291996468.

The previous prime is 291996433. The next prime is 291996479. The reversal of 291996469 is 964699192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290293444 + 1703025 = 17038^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 291996469 - 2¹⁵ = 291963701 is a prime.

It is a super-2 number, since 2×291996469² = 170523875816935922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291996479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145998234 + 145998235.

It is an arithmetic number, because the mean of its divisors is an integer number (145998235).

Almost surely, 2^291996469 is an apocalyptic number.

It is an amenable number.

291996469 is a deficient number, since it is larger than the sum of its proper divisors (1).

291996469 is an equidigital number, since it uses as much as digits as its factorization.

291996469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 55.

The square root of 291996469 is about 17087.9041722500. The cubic root of 291996469 is about 663.4260695128.

The spelling of 291996469 in words is "two hundred ninety-one million, nine hundred ninety-six thousand, four hundred sixty-nine".