61339813 has 8 divisors (see below), whose sum is σ = 63115416. Its totient is φ = 59577600.

The previous prime is 61339807. The next prime is 61339819. The reversal of 61339813 is 31893316.

It is an interprime number because it is at equal distance from previous prime (61339807) and next prime (61339819).

It can be written as a sum of positive squares in 4 ways, for example, as 1633284 + 59706529 = 1278^2 + 7727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61339813 - 2⁹ = 61339301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61339819) 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, 6343 + ... + 12763.

It is an arithmetic number, because the mean of its divisors is an integer number (7889427).

Almost surely, 2^61339813 is an apocalyptic number.

It is an amenable number.

61339813 is a deficient number, since it is larger than the sum of its proper divisors (1775603).

61339813 is a wasteful number, since it uses less digits than its factorization.

61339813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695.

The product of its digits is 11664, while the sum is 34.

The square root of 61339813 is about 7831.9737614474. The cubic root of 61339813 is about 394.3793339655.

The spelling of 61339813 in words is "sixty-one million, three hundred thirty-nine thousand, eight hundred thirteen".