62991139 has 4 divisors (see below), whose sum is σ = 64331424. Its totient is φ = 61650856.

The previous prime is 62991127. The next prime is 62991169. The reversal of 62991139 is 93119926.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 62991139 - 2⁷ = 62991011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (62991109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670072 + ... + 670165.

It is an arithmetic number, because the mean of its divisors is an integer number (16082856).

Almost surely, 2^62991139 is an apocalyptic number.

62991139 is a deficient number, since it is larger than the sum of its proper divisors (1340285).

62991139 is a wasteful number, since it uses less digits than its factorization.

62991139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340284.

The product of its digits is 26244, while the sum is 40.

The square root of 62991139 is about 7936.6957230324. The cubic root of 62991139 is about 397.8870646631.

The spelling of 62991139 in words is "sixty-two million, nine hundred ninety-one thousand, one hundred thirty-nine".