61931073 has 8 divisors (see below), whose sum is σ = 82702336. Its totient is φ = 41223600.

The previous prime is 61931071. The next prime is 61931113. The reversal of 61931073 is 37013916.

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

It is not a de Polignac number, because 61931073 - 2¹ = 61931071 is a prime.

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 61931073.

It is not an unprimeable number, because it can be changed into a prime (61931071) 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, 13633 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (10337792).

Almost surely, 2^61931073 is an apocalyptic number.

It is an amenable number.

61931073 is a deficient number, since it is larger than the sum of its proper divisors (20771263).

61931073 is a wasteful number, since it uses less digits than its factorization.

61931073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31895.

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

The square root of 61931073 is about 7869.6297879888. The cubic root of 61931073 is about 395.6424369076.

Adding to 61931073 its reverse (37013916), we get a palindrome (98944989).

The spelling of 61931073 in words is "sixty-one million, nine hundred thirty-one thousand, seventy-three".