464389391 has 4 divisors (see below), whose sum is σ = 491706432. Its totient is φ = 437072352.

The previous prime is 464389351. The next prime is 464389403. The reversal of 464389391 is 193983464.

It is a happy number.

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 464389391 - 2⁶ = 464389327 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 (464389301) 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, 13658495 + ... + 13658528.

It is an arithmetic number, because the mean of its divisors is an integer number (122926608).

Almost surely, 2^464389391 is an apocalyptic number.

464389391 is a deficient number, since it is larger than the sum of its proper divisors (27317041).

464389391 is a wasteful number, since it uses less digits than its factorization.

464389391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27317040.

The product of its digits is 559872, while the sum is 47.

The square root of 464389391 is about 21549.6958447213. The cubic root of 464389391 is about 774.3918314420.

The spelling of 464389391 in words is "four hundred sixty-four million, three hundred eighty-nine thousand, three hundred ninety-one".