61606399 has 2 divisors, whose sum is σ = 61606400. Its totient is φ = 61606398.

The previous prime is 61606387. The next prime is 61606409. The reversal of 61606399 is 99360616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61606399 - 2¹¹ = 61604351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61606309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803199 + 30803200.

It is an arithmetic number, because the mean of its divisors is an integer number (30803200).

Almost surely, 2^61606399 is an apocalyptic number.

61606399 is a deficient number, since it is larger than the sum of its proper divisors (1).

61606399 is an equidigital number, since it uses as much as digits as its factorization.

61606399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 61606399 is about 7848.9743916005. The cubic root of 61606399 is about 394.9498392748.

The spelling of 61606399 in words is "sixty-one million, six hundred six thousand, three hundred ninety-nine".