61987317 has 8 divisors (see below), whose sum is σ = 94456896. Its totient is φ = 35421312.

The previous prime is 61987301. The next prime is 61987333. The reversal of 61987317 is 71378916.

It is an interprime number because it is at equal distance from previous prime (61987301) and next prime (61987333).

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

It is not a de Polignac number, because 61987317 - 2⁴ = 61987301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61987397) 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, 1475868 + ... + 1475909.

It is an arithmetic number, because the mean of its divisors is an integer number (11807112).

Almost surely, 2^61987317 is an apocalyptic number.

It is an amenable number.

61987317 is a deficient number, since it is larger than the sum of its proper divisors (32469579).

61987317 is a wasteful number, since it uses less digits than its factorization.

61987317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951787.

The product of its digits is 63504, while the sum is 42.

The square root of 61987317 is about 7873.2024615146. The cubic root of 61987317 is about 395.7621709882.

The spelling of 61987317 in words is "sixty-one million, nine hundred eighty-seven thousand, three hundred seventeen".