61387 has 8 divisors (see below), whose sum is σ = 68256. Its totient is φ = 54912.

The previous prime is 61381. The next prime is 61403. The reversal of 61387 is 78316.

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 61387 - 2³ = 61379 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61387.

It is not an unprimeable number, because it can be changed into a prime (61381) 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, 313 + ... + 469.

It is an arithmetic number, because the mean of its divisors is an integer number (8532).

2⁶¹³⁸⁷ is an apocalyptic number.

61387 is the 157-th heptagonal number.

61387 is a deficient number, since it is larger than the sum of its proper divisors (6869).

61387 is a wasteful number, since it uses less digits than its factorization.

61387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its digits is 1008, while the sum is 25.

The square root of 61387 is about 247.7640006135. The cubic root of 61387 is about 39.4480436370.

The spelling of 61387 in words is "sixty-one thousand, three hundred eighty-seven".