60390991 has 4 divisors (see below), whose sum is σ = 61863984. Its totient is φ = 58918000.

The previous prime is 60390977. The next prime is 60391027. The reversal of 60390991 is 19909306.

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 60390991 - 2⁵ = 60390959 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 60390991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60390931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736435 + ... + 736516.

It is an arithmetic number, because the mean of its divisors is an integer number (15465996).

Almost surely, 2^60390991 is an apocalyptic number.

60390991 is a deficient number, since it is larger than the sum of its proper divisors (1472993).

60390991 is a wasteful number, since it uses less digits than its factorization.

60390991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472992.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 60390991 is about 7771.1640698161. The cubic root of 60390991 is about 392.3353002850.

The spelling of 60390991 in words is "sixty million, three hundred ninety thousand, nine hundred ninety-one".