1993780047 has 32 divisors (see below), whose sum is σ = 3205923840. Its totient is φ = 1077500160.

The previous prime is 1993780031. The next prime is 1993780051. The reversal of 1993780047 is 7400873991.

It is not a de Polignac number, because 1993780047 - 2⁴ = 1993780031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1993779978 and 1993780005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993780007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19797 + ... + 66177.

It is an arithmetic number, because the mean of its divisors is an integer number (100185120).

Almost surely, 2^1993780047 is an apocalyptic number.

1993780047 is a deficient number, since it is larger than the sum of its proper divisors (1212143793).

1993780047 is a wasteful number, since it uses less digits than its factorization.

1993780047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46503.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1993780047 is about 44651.7642092673. The cubic root of 1993780047 is about 1258.6135852763.

The spelling of 1993780047 in words is "one billion, nine hundred ninety-three million, seven hundred eighty thousand, forty-seven".