60840091 has 4 divisors (see below), whose sum is σ = 65520112. Its totient is φ = 56160072.

The previous prime is 60840061. The next prime is 60840097. The reversal of 60840091 is 19004806.

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 60840091 - 2⁷ = 60839963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60840097) 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, 2339991 + ... + 2340016.

It is an arithmetic number, because the mean of its divisors is an integer number (16380028).

Almost surely, 2^60840091 is an apocalyptic number.

60840091 is a deficient number, since it is larger than the sum of its proper divisors (4680021).

60840091 is a wasteful number, since it uses less digits than its factorization.

60840091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680020.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 60840091 is about 7800.0058333312. The cubic root of 60840091 is about 393.3054384284.

Adding to 60840091 its reverse (19004806), we get a palindrome (79844897).

The spelling of 60840091 in words is "sixty million, eight hundred forty thousand, ninety-one".