601447991 has 4 divisors (see below), whose sum is σ = 601519584. Its totient is φ = 601376400.

The previous prime is 601447969. The next prime is 601447993. The reversal of 601447991 is 199744106.

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 601447991 - 2⁶ = 601447927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601447993) 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, 21215 + ... + 40656.

It is an arithmetic number, because the mean of its divisors is an integer number (150379896).

Almost surely, 2^601447991 is an apocalyptic number.

601447991 is a deficient number, since it is larger than the sum of its proper divisors (71593).

601447991 is an equidigital number, since it uses as much as digits as its factorization.

601447991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71592.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 601447991 is about 24524.4366092271. The cubic root of 601447991 is about 844.1106107325.

The spelling of 601447991 in words is "six hundred one million, four hundred forty-seven thousand, nine hundred ninety-one".