2431398991 has 8 divisors (see below), whose sum is σ = 2779729920. Its totient is φ = 2083315128.

The previous prime is 2431398967. The next prime is 2431398997. The reversal of 2431398991 is 1998931342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2431398991 - 2¹³ = 2431390799 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 (2431398997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40171 + ... + 80476.

It is an arithmetic number, because the mean of its divisors is an integer number (347466240).

Almost surely, 2^2431398991 is an apocalyptic number.

2431398991 is a deficient number, since it is larger than the sum of its proper divisors (348330929).

2431398991 is a wasteful number, since it uses less digits than its factorization.

2431398991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123533.

The product of its digits is 419904, while the sum is 49.

The square root of 2431398991 is about 49309.2181138578. The cubic root of 2431398991 is about 1344.6793763191.

The spelling of 2431398991 in words is "two billion, four hundred thirty-one million, three hundred ninety-eight thousand, nine hundred ninety-one".