1997503794 has 64 divisors (see below), whose sum is σ = 5214948480. Its totient is φ = 558740160.

The previous prime is 1997503787. The next prime is 1997503819. The reversal of 1997503794 is 4973057991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1997503794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121617 + ... + 137060.

It is an arithmetic number, because the mean of its divisors is an integer number (81483570).

Almost surely, 2^1997503794 is an apocalyptic number.

1997503794 is an abundant number, since it is smaller than the sum of its proper divisors (3217444686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997503794 is a wasteful number, since it uses less digits than its factorization.

1997503794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258712 (or 258706 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 1997503794 is about 44693.4424048987. The cubic root of 1997503794 is about 1259.3966612566.

The spelling of 1997503794 in words is "one billion, nine hundred ninety-seven million, five hundred three thousand, seven hundred ninety-four".