694520749 has 4 divisors (see below), whose sum is σ = 747945436. Its totient is φ = 641096064.

The previous prime is 694520731. The next prime is 694520767. The reversal of 694520749 is 947025496.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (694520731) and next prime (694520767).

It can be written as a sum of positive squares in 2 ways, for example, as 205005124 + 489515625 = 14318^2 + 22125^2 .

It is a cyclic number.

It is not a de Polignac number, because 694520749 - 2⁹ = 694520237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 694520699 and 694520708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694523749) 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, 26712324 + ... + 26712349.

It is an arithmetic number, because the mean of its divisors is an integer number (186986359).

Almost surely, 2^694520749 is an apocalyptic number.

It is an amenable number.

694520749 is a deficient number, since it is larger than the sum of its proper divisors (53424687).

694520749 is a wasteful number, since it uses less digits than its factorization.

694520749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53424686.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 694520749 is about 26353.7615721172. The cubic root of 694520749 is about 885.5812407402.

The spelling of 694520749 in words is "six hundred ninety-four million, five hundred twenty thousand, seven hundred forty-nine".