499991947 has 16 divisors (see below), whose sum is σ = 651575232. Its totient is φ = 372326400.

The previous prime is 499991941. The next prime is 499991951. The reversal of 499991947 is 749199994.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 499991947 - 2³ = 499991939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499991941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160054 + ... + 163147.

It is an arithmetic number, because the mean of its divisors is an integer number (40723452).

Almost surely, 2^499991947 is an apocalyptic number.

499991947 is a deficient number, since it is larger than the sum of its proper divisors (151583285).

499991947 is a wasteful number, since it uses less digits than its factorization.

499991947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323238.

The product of its digits is 6613488, while the sum is 61.

The square root of 499991947 is about 22360.4997037186. The cubic root of 499991947 is about 793.6962648477.

The spelling of 499991947 in words is "four hundred ninety-nine million, nine hundred ninety-one thousand, nine hundred forty-seven".