769969991 has 8 divisors (see below), whose sum is σ = 880432800. Its totient is φ = 659623968.

The previous prime is 769969979. The next prime is 769970009. The reversal of 769969991 is 199969967.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 769969991 - 2¹⁰ = 769968967 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 (769969901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14576 + ... + 41861.

It is an arithmetic number, because the mean of its divisors is an integer number (110054100).

Almost surely, 2^769969991 is an apocalyptic number.

769969991 is a deficient number, since it is larger than the sum of its proper divisors (110462809).

769969991 is a wasteful number, since it uses less digits than its factorization.

769969991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58393.

The product of its digits is 14880348, while the sum is 65.

The square root of 769969991 is about 27748.3331211084. Note that the first 3 decimals coincide. The cubic root of 769969991 is about 916.5537382574.

The spelling of 769969991 in words is "seven hundred sixty-nine million, nine hundred sixty-nine thousand, nine hundred ninety-one".