61128433 has 4 divisors (see below), whose sum is σ = 63236340. Its totient is φ = 59020528.

The previous prime is 61128427. The next prime is 61128437. The reversal of 61128433 is 33482116.

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 16064064 + 45064369 = 4008^2 + 6713^2 .

It is a cyclic number.

It is not a de Polignac number, because 61128433 - 2⁵ = 61128401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61128437) 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, 1053910 + ... + 1053967.

It is an arithmetic number, because the mean of its divisors is an integer number (15809085).

Almost surely, 2^61128433 is an apocalyptic number.

It is an amenable number.

61128433 is a deficient number, since it is larger than the sum of its proper divisors (2107907).

61128433 is a wasteful number, since it uses less digits than its factorization.

61128433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107906.

The product of its digits is 3456, while the sum is 28.

The square root of 61128433 is about 7818.4674329436. The cubic root of 61128433 is about 393.9257957604.

The spelling of 61128433 in words is "sixty-one million, one hundred twenty-eight thousand, four hundred thirty-three".