1977494803 has 4 divisors (see below), whose sum is σ = 1988542440. Its totient is φ = 1966447168.

The previous prime is 1977494747. The next prime is 1977494807. The reversal of 1977494803 is 3084947791.

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 1977494803 - 2²¹ = 1975397651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1977494807) 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, 5523550 + ... + 5523907.

It is an arithmetic number, because the mean of its divisors is an integer number (497135610).

Almost surely, 2^1977494803 is an apocalyptic number.

1977494803 is a deficient number, since it is larger than the sum of its proper divisors (11047637).

1977494803 is a wasteful number, since it uses less digits than its factorization.

1977494803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047636.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 1977494803 is about 44469.0319548335. The cubic root of 1977494803 is about 1255.1774171805.

The spelling of 1977494803 in words is "one billion, nine hundred seventy-seven million, four hundred ninety-four thousand, eight hundred three".