61381073 has 16 divisors (see below), whose sum is σ = 67502400. Its totient is φ = 55473984.

The previous prime is 61381037. The next prime is 61381093. The reversal of 61381073 is 37018316.

61381073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61381073 - 2⁶ = 61381009 is a prime.

It is a super-2 number, since 2×61381073² = 7535272245262658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61381093) 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 15 ways as a sum of consecutive naturals, for example, 175703 + ... + 176051.

It is an arithmetic number, because the mean of its divisors is an integer number (4218900).

Almost surely, 2^61381073 is an apocalyptic number.

It is an amenable number.

61381073 is a deficient number, since it is larger than the sum of its proper divisors (6121327).

61381073 is a wasteful number, since it uses less digits than its factorization.

61381073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61381073 is about 7834.6073928436. The cubic root of 61381073 is about 394.4677400834.

Adding to 61381073 its reverse (37018316), we get a palindrome (98399389).

The spelling of 61381073 in words is "sixty-one million, three hundred eighty-one thousand, seventy-three".