807689749 has 4 divisors (see below), whose sum is σ = 807913440. Its totient is φ = 807466060.

The previous prime is 807689747. The next prime is 807689851. The reversal of 807689749 is 947986708.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 807689749 - 2¹ = 807689747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 807689693 and 807689702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (807689741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106339 + ... + 113680.

It is an arithmetic number, because the mean of its divisors is an integer number (201978360).

Almost surely, 2^807689749 is an apocalyptic number.

It is an amenable number.

807689749 is a deficient number, since it is larger than the sum of its proper divisors (223691).

807689749 is a wasteful number, since it uses less digits than its factorization.

807689749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223690.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The square root of 807689749 is about 28419.8829870920. The cubic root of 807689749 is about 931.2826749252.

The spelling of 807689749 in words is "eight hundred seven million, six hundred eighty-nine thousand, seven hundred forty-nine".