61449005 has 4 divisors (see below), whose sum is σ = 73738812. Its totient is φ = 49159200.

The previous prime is 61449001. The next prime is 61449013. The reversal of 61449005 is 50094416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13410244 + 48038761 = 3662^2 + 6931^2 .

It is not a de Polignac number, because 61449005 - 2² = 61449001 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 (61449001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6144896 + ... + 6144905.

It is an arithmetic number, because the mean of its divisors is an integer number (18434703).

Almost surely, 2^61449005 is an apocalyptic number.

It is an amenable number.

61449005 is a deficient number, since it is larger than the sum of its proper divisors (12289807).

61449005 is a wasteful number, since it uses less digits than its factorization.

61449005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289806.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 61449005 is about 7838.9415739626. The cubic root of 61449005 is about 394.6132089370.

The spelling of 61449005 in words is "sixty-one million, four hundred forty-nine thousand, five".