769567 has 4 divisors (see below), whose sum is σ = 771760. Its totient is φ = 767376.

The previous prime is 769553. The next prime is 769577. The reversal of 769567 is 765967.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765967 = 137 ⋅5591.

It is a 4-Lehmer number, since φ(769567) divides (769567-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 769567 - 2¹⁹ = 245279 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 (769547) 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, 438 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (192940).

It is a Poulet number, since it divides 2⁷⁶⁹⁵⁶⁶-1.

2⁷⁶⁹⁵⁶⁷ is an apocalyptic number.

769567 is the 439-th decagonal number.

769567 is a deficient number, since it is larger than the sum of its proper divisors (2193).

769567 is a wasteful number, since it uses less digits than its factorization.

769567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 79380, while the sum is 40.

The square root of 769567 is about 877.2496793958. The cubic root of 769567 is about 91.6393806758.

Subtracting from 769567 its reverse (765967), we obtain a square (3600 = 60²).

The spelling of 769567 in words is "seven hundred sixty-nine thousand, five hundred sixty-seven".