61608091 has 2 divisors, whose sum is σ = 61608092. Its totient is φ = 61608090.

The previous prime is 61608083. The next prime is 61608133. The reversal of 61608091 is 19080616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61608091 - 2³ = 61608083 is a prime.

It is not a weakly prime, because it can be changed into another prime (61608011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30804045 + 30804046.

It is an arithmetic number, because the mean of its divisors is an integer number (30804046).

Almost surely, 2^61608091 is an apocalyptic number.

61608091 is a deficient number, since it is larger than the sum of its proper divisors (1).

61608091 is an equidigital number, since it uses as much as digits as its factorization.

61608091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 61608091 is about 7849.0821756432. The cubic root of 61608091 is about 394.9534549653.

The spelling of 61608091 in words is "sixty-one million, six hundred eight thousand, ninety-one".