61534943 has 2 divisors, whose sum is σ = 61534944. Its totient is φ = 61534942.

The previous prime is 61534937. The next prime is 61535003. The reversal of 61534943 is 34943516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61534943 - 2⁴ = 61534927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61534903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30767471 + 30767472.

It is an arithmetic number, because the mean of its divisors is an integer number (30767472).

Almost surely, 2^61534943 is an apocalyptic number.

61534943 is a deficient number, since it is larger than the sum of its proper divisors (1).

61534943 is an equidigital number, since it uses as much as digits as its factorization.

61534943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 61534943 is about 7844.4211386182. The cubic root of 61534943 is about 394.7970821240.

The spelling of 61534943 in words is "sixty-one million, five hundred thirty-four thousand, nine hundred forty-three".