1023781964 has 6 divisors (see below), whose sum is σ = 1791618444. Its totient is φ = 511890980.

The previous prime is 1023781951. The next prime is 1023781987. The reversal of 1023781964 is 4691873201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127972742 + ... + 127972749.

It is an arithmetic number, because the mean of its divisors is an integer number (298603074).

Almost surely, 2^1023781964 is an apocalyptic number.

It is an amenable number.

1023781964 is a deficient number, since it is larger than the sum of its proper divisors (767836480).

1023781964 is a wasteful number, since it uses less digits than its factorization.

1023781964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255945495 (or 255945493 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1023781964 is about 31996.5930061311. The cubic root of 1023781964 is about 1007.8652962581.

The spelling of 1023781964 in words is "one billion, twenty-three million, seven hundred eighty-one thousand, nine hundred sixty-four".