61931249 has 8 divisors (see below), whose sum is σ = 65590080. Its totient is φ = 58352976.

The previous prime is 61931239. The next prime is 61931257. The reversal of 61931249 is 94213916.

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

It is a cyclic number.

It is not a de Polignac number, because 61931249 - 2⁸ = 61930993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61931239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18554 + ... + 21635.

It is an arithmetic number, because the mean of its divisors is an integer number (8198760).

Almost surely, 2^61931249 is an apocalyptic number.

It is an amenable number.

61931249 is a deficient number, since it is larger than the sum of its proper divisors (3658831).

61931249 is a wasteful number, since it uses less digits than its factorization.

61931249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40279.

The product of its digits is 11664, while the sum is 35.

The square root of 61931249 is about 7869.6409702095. The cubic root of 61931249 is about 395.6428116952.

The spelling of 61931249 in words is "sixty-one million, nine hundred thirty-one thousand, two hundred forty-nine".