61444129 has 4 divisors (see below), whose sum is σ = 61462576. Its totient is φ = 61425684.

The previous prime is 61444121. The next prime is 61444189. The reversal of 61444129 is 92144416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61444129 - 2³ = 61444121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61444129.

It is not an unprimeable number, because it can be changed into a prime (61444121) 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, 2679 + ... + 11404.

It is an arithmetic number, because the mean of its divisors is an integer number (15365644).

Almost surely, 2^61444129 is an apocalyptic number.

It is an amenable number.

61444129 is a deficient number, since it is larger than the sum of its proper divisors (18447).

61444129 is a wasteful number, since it uses less digits than its factorization.

61444129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446.

The product of its digits is 6912, while the sum is 31.

The square root of 61444129 is about 7838.6305564174. The cubic root of 61444129 is about 394.6027710956.

The spelling of 61444129 in words is "sixty-one million, four hundred forty-four thousand, one hundred twenty-nine".