61317249 has 16 divisors (see below), whose sum is σ = 98932608. Its totient is φ = 32977152.

The previous prime is 61317247. The next prime is 61317253. The reversal of 61317249 is 94271316.

It is not a de Polignac number, because 61317249 - 2¹ = 61317247 is a prime.

It is a super-3 number, since 3×61317249³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61317247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85522 + ... + 86235.

It is an arithmetic number, because the mean of its divisors is an integer number (6183288).

Almost surely, 2^61317249 is an apocalyptic number.

It is an amenable number.

61317249 is a deficient number, since it is larger than the sum of its proper divisors (37615359).

61317249 is a wasteful number, since it uses less digits than its factorization.

61317249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171784.

The product of its digits is 9072, while the sum is 33.

The square root of 61317249 is about 7830.5331236130. The cubic root of 61317249 is about 394.3309702344.

The spelling of 61317249 in words is "sixty-one million, three hundred seventeen thousand, two hundred forty-nine".