1019897992 has 16 divisors (see below), whose sum is σ = 1933796700. Its totient is φ = 504218880.

The previous prime is 1019897971. The next prime is 1019898023. The reversal of 1019897992 is 2997989101.

It can be written as a sum of positive squares in 2 ways, for example, as 983825956 + 36072036 = 31366^2 + 6006^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715509 + ... + 716932.

Almost surely, 2^1019897992 is an apocalyptic number.

It is an amenable number.

1019897992 is a deficient number, since it is larger than the sum of its proper divisors (913898708).

1019897992 is a wasteful number, since it uses less digits than its factorization.

1019897992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432536 (or 1432532 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 55.

The square root of 1019897992 is about 31935.8418082254. The cubic root of 1019897992 is about 1006.5891517194.

It can be divided in two parts, 101989799 and 2, that added together give a square (101989801 = 10099²).

The spelling of 1019897992 in words is "one billion, nineteen million, eight hundred ninety-seven thousand, nine hundred ninety-two".