61540093 has 2 divisors, whose sum is σ = 61540094. Its totient is φ = 61540092.

The previous prime is 61540081. The next prime is 61540097. The reversal of 61540093 is 39004516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61183684 + 356409 = 7822^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 61540093 - 2⁹ = 61539581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61540097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30770046 + 30770047.

It is an arithmetic number, because the mean of its divisors is an integer number (30770047).

Almost surely, 2^61540093 is an apocalyptic number.

It is an amenable number.

61540093 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540093 is an equidigital number, since it uses as much as digits as its factorization.

61540093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 61540093 is about 7844.7493905159. The cubic root of 61540093 is about 394.8080956401.

The spelling of 61540093 in words is "sixty-one million, five hundred forty thousand, ninety-three".