61399130 has 16 divisors (see below), whose sum is σ = 119020104. Its totient is φ = 22670400.

The previous prime is 61399111. The next prime is 61399133. The reversal of 61399130 is 3199316.

It can be written as a sum of positive squares in 4 ways, for example, as 32228329 + 29170801 = 5677^2 + 5401^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61399133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236021 + ... + 236280.

Almost surely, 2^61399130 is an apocalyptic number.

61399130 is a deficient number, since it is larger than the sum of its proper divisors (57620974).

61399130 is a wasteful number, since it uses less digits than its factorization.

61399130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472321.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 61399130 is about 7835.7596951412. The cubic root of 61399130 is about 394.5064176175.

The spelling of 61399130 in words is "sixty-one million, three hundred ninety-nine thousand, one hundred thirty".