61430885 has 8 divisors (see below), whose sum is σ = 73759896. Its totient is φ = 49116160.

The previous prime is 61430881. The next prime is 61430891. The reversal of 61430885 is 58803416.

It can be written as a sum of positive squares in 4 ways, for example, as 10764961 + 50665924 = 3281^2 + 7118^2 .

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

It is not a de Polignac number, because 61430885 - 2² = 61430881 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 (61430881) 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, 12365 + ... + 16605.

It is an arithmetic number, because the mean of its divisors is an integer number (9219987).

Almost surely, 2^61430885 is an apocalyptic number.

It is an amenable number.

61430885 is a deficient number, since it is larger than the sum of its proper divisors (12329011).

61430885 is a wasteful number, since it uses less digits than its factorization.

61430885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 61430885 is about 7837.7857204698. The cubic root of 61430885 is about 394.5744174529.

The spelling of 61430885 in words is "sixty-one million, four hundred thirty thousand, eight hundred eighty-five".