1290783964 has 6 divisors (see below), whose sum is σ = 2258871944. Its totient is φ = 645391980.

The previous prime is 1290783941. The next prime is 1290783979. The reversal of 1290783964 is 4693870921.

It is a super-2 number, since 2×1290783964² = 3332246483439106592, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 161347992 + ... + 161347999.

Almost surely, 2^1290783964 is an apocalyptic number.

It is an amenable number.

1290783964 is a deficient number, since it is larger than the sum of its proper divisors (968087980).

1290783964 is a wasteful number, since it uses less digits than its factorization.

1290783964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322695995 (or 322695993 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1290783964 is about 35927.4820158608. The cubic root of 1290783964 is about 1088.8077090034.

The spelling of 1290783964 in words is "one billion, two hundred ninety million, seven hundred eighty-three thousand, nine hundred sixty-four".