61993541 has 2 divisors, whose sum is σ = 61993542. Its totient is φ = 61993540.

The previous prime is 61993531. The next prime is 61993549. The reversal of 61993541 is 14539916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52562500 + 9431041 = 7250^2 + 3071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61993541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61993495 and 61993504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61993549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30996770 + 30996771.

It is an arithmetic number, because the mean of its divisors is an integer number (30996771).

Almost surely, 2^61993541 is an apocalyptic number.

It is an amenable number.

61993541 is a deficient number, since it is larger than the sum of its proper divisors (1).

61993541 is an equidigital number, since it uses as much as digits as its factorization.

61993541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 61993541 is about 7873.5977164191. The cubic root of 61993541 is about 395.7754163929.

The spelling of 61993541 in words is "sixty-one million, nine hundred ninety-three thousand, five hundred forty-one".