764749 has 4 divisors (see below), whose sum is σ = 767520. Its totient is φ = 761980.

The previous prime is 764723. The next prime is 764783. The reversal of 764749 is 947467.

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, and also an emirpimes, since its reverse is a distinct semiprime: 947467 = 73 ⋅12979.

It is a cyclic number.

It is not a de Polignac number, because 764749 - 2⁵ = 764717 is a prime.

It is a Duffinian number.

764749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764719) 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, 919 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (191880).

2⁷⁶⁴⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

764749 is a deficient number, since it is larger than the sum of its proper divisors (2771).

764749 is a wasteful number, since it uses less digits than its factorization.

764749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its digits is 42336, while the sum is 37.

The square root of 764749 is about 874.4992853056. The cubic root of 764749 is about 91.4477390756.

Adding to 764749 its product of digits (42336), we get a triangular number (807085 = T₁₂₇₀).

The spelling of 764749 in words is "seven hundred sixty-four thousand, seven hundred forty-nine".