743520069 has 12 divisors (see below), whose sum is σ = 1103000236. Its totient is φ = 482283072.

The previous prime is 743520061. The next prime is 743520077. The reversal of 743520069 is 960025347.

743520069 is a `hidden beast` number, since 74 + 3 + 520 + 0 + 69 = 666.

It is an interprime number because it is at equal distance from previous prime (743520061) and next prime (743520077).

It can be written as a sum of positive squares in 2 ways, for example, as 615536100 + 127983969 = 24810^2 + 11313^2 .

It is not a de Polignac number, because 743520069 - 2³ = 743520061 is a prime.

It is a super-2 number, since 2×743520069² = 1105644186011529522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743520061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116064 + ... + 1116729.

Almost surely, 2^743520069 is an apocalyptic number.

It is an amenable number.

743520069 is a deficient number, since it is larger than the sum of its proper divisors (359480167).

743520069 is a wasteful number, since it uses less digits than its factorization.

743520069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232836 (or 2232833 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 743520069 is about 27267.5644126864. The cubic root of 743520069 is about 905.9360984417.

The spelling of 743520069 in words is "seven hundred forty-three million, five hundred twenty thousand, sixty-nine".