62991 has 8 divisors (see below), whose sum is σ = 93360. Its totient is φ = 41976.

The previous prime is 62989. The next prime is 63029. The reversal of 62991 is 19926.

It is a happy number.

It is not a de Polignac number, because 62991 - 2¹ = 62989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2333 = 62991 / (6 + 2 + 9 + 9 + 1).

It is an Ulam number.

62991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (62921) 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, 1140 + ... + 1193.

It is an arithmetic number, because the mean of its divisors is an integer number (11670).

2⁶²⁹⁹¹ is an apocalyptic number.

62991 is a deficient number, since it is larger than the sum of its proper divisors (30369).

62991 is a wasteful number, since it uses less digits than its factorization.

62991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 62991 is about 250.9800788907. The cubic root of 62991 is about 39.7886771996.

The spelling of 62991 in words is "sixty-two thousand, nine hundred ninety-one".