61907133 has 4 divisors (see below), whose sum is σ = 82542848. Its totient is φ = 41271420.

The previous prime is 61907123. The next prime is 61907147. The reversal of 61907133 is 33170916.

61907133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 61907133 - 2⁴ = 61907117 is a prime.

It is a super-3 number, since 3×61907133³ (a number of 24 digits) contains 333 as substring.

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 61907133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61907113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10317853 + ... + 10317858.

It is an arithmetic number, because the mean of its divisors is an integer number (20635712).

Almost surely, 2^61907133 is an apocalyptic number.

It is an amenable number.

61907133 is a deficient number, since it is larger than the sum of its proper divisors (20635715).

61907133 is a wasteful number, since it uses less digits than its factorization.

61907133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20635714.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 61907133 is about 7868.1086037243. The cubic root of 61907133 is about 395.5914506514.

The spelling of 61907133 in words is "sixty-one million, nine hundred seven thousand, one hundred thirty-three".