61030813 has 4 divisors (see below), whose sum is σ = 61766208. Its totient is φ = 60295420.

The previous prime is 61030811. The next prime is 61030841. The reversal of 61030813 is 31803016.

61030813 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 a cyclic number.

It is not a de Polignac number, because 61030813 - 2¹ = 61030811 is a prime.

It is a super-3 number, since 3×61030813³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61030811) 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, 367573 + ... + 367738.

It is an arithmetic number, because the mean of its divisors is an integer number (15441552).

Almost surely, 2^61030813 is an apocalyptic number.

It is an amenable number.

61030813 is a deficient number, since it is larger than the sum of its proper divisors (735395).

61030813 is an equidigital number, since it uses as much as digits as its factorization.

61030813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735394.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 61030813 is about 7812.2220270548. Note that the first 3 decimals coincide. The cubic root of 61030813 is about 393.7159887310.

Adding to 61030813 its reverse (31803016), we get a palindrome (92833829).

The spelling of 61030813 in words is "sixty-one million, thirty thousand, eight hundred thirteen".