61393899 has 16 divisors (see below), whose sum is σ = 96779520. Its totient is φ = 33872160.

The previous prime is 61393889. The next prime is 61393901. The reversal of 61393899 is 99839316.

It is a happy number.

It is not a de Polignac number, because 61393899 - 2⁵ = 61393867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61393859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49797 + ... + 51014.

It is an arithmetic number, because the mean of its divisors is an integer number (6048720).

Almost surely, 2^61393899 is an apocalyptic number.

61393899 is a deficient number, since it is larger than the sum of its proper divisors (35385621).

61393899 is a wasteful number, since it uses less digits than its factorization.

61393899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100850.

The product of its digits is 314928, while the sum is 48.

The square root of 61393899 is about 7835.4258978054. The cubic root of 61393899 is about 394.4952137580.

The spelling of 61393899 in words is "sixty-one million, three hundred ninety-three thousand, eight hundred ninety-nine".