61533943 has 2 divisors, whose sum is σ = 61533944. Its totient is φ = 61533942.

The previous prime is 61533937. The next prime is 61533973. The reversal of 61533943 is 34933516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61533943 - 2²¹ = 59436791 is a prime.

It is a super-2 number, since 2×61533943² = 7572852282254498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61533899 and 61533908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61533973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30766971 + 30766972.

It is an arithmetic number, because the mean of its divisors is an integer number (30766972).

Almost surely, 2^61533943 is an apocalyptic number.

61533943 is a deficient number, since it is larger than the sum of its proper divisors (1).

61533943 is an equidigital number, since it uses as much as digits as its factorization.

61533943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 61533943 is about 7844.3573987931. The cubic root of 61533943 is about 394.7949435059.

The spelling of 61533943 in words is "sixty-one million, five hundred thirty-three thousand, nine hundred forty-three".