62991091 has 4 divisors (see below), whose sum is σ = 63414000. Its totient is φ = 62568184.

The previous prime is 62991037. The next prime is 62991109. The reversal of 62991091 is 19019926.

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 62991091 - 2¹⁷ = 62860019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 62991091.

It is not an unprimeable number, because it can be changed into a prime (62991011) 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, 211231 + ... + 211528.

It is an arithmetic number, because the mean of its divisors is an integer number (15853500).

Almost surely, 2^62991091 is an apocalyptic number.

62991091 is a deficient number, since it is larger than the sum of its proper divisors (422909).

62991091 is a wasteful number, since it uses less digits than its factorization.

62991091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422908.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 62991091 is about 7936.6926991033. The cubic root of 62991091 is about 397.8869635982.

The spelling of 62991091 in words is "sixty-two million, nine hundred ninety-one thousand, ninety-one".