763540991 has 16 divisors (see below), whose sum is σ = 820471680. Its totient is φ = 709297920.

The previous prime is 763540963. The next prime is 763540993. The reversal of 763540991 is 199045367.

It is a cyclic number.

It is not a de Polignac number, because 763540991 - 2⁶ = 763540927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (763540993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 65945 + ... + 76653.

It is an arithmetic number, because the mean of its divisors is an integer number (51279480).

Almost surely, 2^763540991 is an apocalyptic number.

763540991 is a deficient number, since it is larger than the sum of its proper divisors (56930689).

763540991 is a wasteful number, since it uses less digits than its factorization.

763540991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 763540991 is about 27632.2454932638. The cubic root of 763540991 is about 913.9956295967.

The spelling of 763540991 in words is "seven hundred sixty-three million, five hundred forty thousand, nine hundred ninety-one".