469787991 has 4 divisors (see below), whose sum is σ = 626383992. Its totient is φ = 313191992.

The previous prime is 469787971. The next prime is 469787999. The reversal of 469787991 is 199787964.

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 469787991 - 2¹³ = 469779799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (469787999) 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, 78297996 + ... + 78298001.

It is an arithmetic number, because the mean of its divisors is an integer number (156595998).

Almost surely, 2^469787991 is an apocalyptic number.

469787991 is a deficient number, since it is larger than the sum of its proper divisors (156596001).

469787991 is a wasteful number, since it uses less digits than its factorization.

469787991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156596000.

The product of its digits is 6858432, while the sum is 60.

The square root of 469787991 is about 21674.5932141759. The cubic root of 469787991 is about 777.3810867791.

The spelling of 469787991 in words is "four hundred sixty-nine million, seven hundred eighty-seven thousand, nine hundred ninety-one".