61438849 has 4 divisors (see below), whose sum is σ = 63557460. Its totient is φ = 59320240.

The previous prime is 61438829. The next prime is 61438859. The reversal of 61438849 is 94883416.

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 19642624 + 41796225 = 4432^2 + 6465^2 .

It is a cyclic number.

It is not a de Polignac number, because 61438849 - 2⁹ = 61438337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61438829) 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, 1059262 + ... + 1059319.

It is an arithmetic number, because the mean of its divisors is an integer number (15889365).

Almost surely, 2^61438849 is an apocalyptic number.

It is an amenable number.

61438849 is a deficient number, since it is larger than the sum of its proper divisors (2118611).

61438849 is a wasteful number, since it uses less digits than its factorization.

61438849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118610.

The product of its digits is 165888, while the sum is 43.

The square root of 61438849 is about 7838.2937556588. The cubic root of 61438849 is about 394.5914678062.

The spelling of 61438849 in words is "sixty-one million, four hundred thirty-eight thousand, eight hundred forty-nine".