61349639 has 8 divisors (see below), whose sum is σ = 66508512. Its totient is φ = 56253600.

The previous prime is 61349623. The next prime is 61349641. The reversal of 61349639 is 93694316.

61349639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61349639 - 2⁴ = 61349623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61349596 and 61349605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61349339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13664 + ... + 17589.

It is an arithmetic number, because the mean of its divisors is an integer number (8313564).

Almost surely, 2^61349639 is an apocalyptic number.

61349639 is a deficient number, since it is larger than the sum of its proper divisors (5158873).

61349639 is a wasteful number, since it uses less digits than its factorization.

61349639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31417.

The product of its digits is 104976, while the sum is 41.

The square root of 61349639 is about 7832.6010366927. The cubic root of 61349639 is about 394.4003913302.

The spelling of 61349639 in words is "sixty-one million, three hundred forty-nine thousand, six hundred thirty-nine".