61995547 has 2 divisors, whose sum is σ = 61995548. Its totient is φ = 61995546.

The previous prime is 61995503. The next prime is 61995559. The reversal of 61995547 is 74559916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61995547 - 2¹¹ = 61993499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61995497 and 61995506.

It is not a weakly prime, because it can be changed into another prime (61992547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30997773 + 30997774.

It is an arithmetic number, because the mean of its divisors is an integer number (30997774).

Almost surely, 2^61995547 is an apocalyptic number.

61995547 is a deficient number, since it is larger than the sum of its proper divisors (1).

61995547 is an equidigital number, since it uses as much as digits as its factorization.

61995547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 46.

The square root of 61995547 is about 7873.7251031516. The cubic root of 61995547 is about 395.7796852082.

The spelling of 61995547 in words is "sixty-one million, nine hundred ninety-five thousand, five hundred forty-seven".