1004399977 has 16 divisors (see below), whose sum is σ = 1187809920. Its totient is φ = 831422592.

The previous prime is 1004399959. The next prime is 1004399987. The reversal of 1004399977 is 7799934001.

It is a happy number.

It is not a de Polignac number, because 1004399977 - 2¹¹ = 1004397929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004399977.

It is not an unprimeable number, because it can be changed into a prime (1004399987) 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, 8043 + ... + 45535.

It is an arithmetic number, because the mean of its divisors is an integer number (74238120).

Almost surely, 2^1004399977 is an apocalyptic number.

It is an amenable number.

1004399977 is a deficient number, since it is larger than the sum of its proper divisors (183409943).

1004399977 is an equidigital number, since it uses as much as digits as its factorization.

1004399977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37632.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 1004399977 is about 31692.2699881217. The cubic root of 1004399977 is about 1001.4645131542.

The spelling of 1004399977 in words is "one billion, four million, three hundred ninety-nine thousand, nine hundred seventy-seven".