61043291 has 2 divisors, whose sum is σ = 61043292. Its totient is φ = 61043290.

The previous prime is 61043287. The next prime is 61043293. The reversal of 61043291 is 19234016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61043291 - 2² = 61043287 is a prime.

It is a super-2 number, since 2×61043291² = 7452566752221362, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 61043293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61043291.

It is not a weakly prime, because it can be changed into another prime (61043293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30521645 + 30521646.

It is an arithmetic number, because the mean of its divisors is an integer number (30521646).

Almost surely, 2^61043291 is an apocalyptic number.

61043291 is a deficient number, since it is larger than the sum of its proper divisors (1).

61043291 is an equidigital number, since it uses as much as digits as its factorization.

61043291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 61043291 is about 7813.0206066540. The cubic root of 61043291 is about 393.7428191854.

The spelling of 61043291 in words is "sixty-one million, forty-three thousand, two hundred ninety-one".