61287317 has 8 divisors (see below), whose sum is σ = 75430656. Its totient is φ = 48490992.

The previous prime is 61287311. The next prime is 61287323. The reversal of 61287317 is 71378216.

It is an interprime number because it is at equal distance from previous prime (61287311) and next prime (61287323).

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 61287317 - 2⁴ = 61287301 is a prime.

It is a super-2 number, since 2×61287317² = 7512270450116978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61287311) 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, 336653 + ... + 336834.

It is an arithmetic number, because the mean of its divisors is an integer number (9428832).

Almost surely, 2^61287317 is an apocalyptic number.

It is an amenable number.

61287317 is a deficient number, since it is larger than the sum of its proper divisors (14143339).

61287317 is a wasteful number, since it uses less digits than its factorization.

61287317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673507.

The product of its digits is 14112, while the sum is 35.

The square root of 61287317 is about 7828.6216539056. The cubic root of 61287317 is about 394.2667956023.

The spelling of 61287317 in words is "sixty-one million, two hundred eighty-seven thousand, three hundred seventeen".