75230649 has 12 divisors (see below), whose sum is σ = 117025636. Its totient is φ = 46295712.

The previous prime is 75230647. The next prime is 75230651. The reversal of 75230649 is 94603257.

75230649 is a `hidden beast` number, since 7 + 5 + 2 + 3 + 0 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (75230647) and next prime (75230651).

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 54464400 = 4557^2 + 7380^2 .

It is not a de Polignac number, because 75230649 - 2¹ = 75230647 is a prime.

It is a super-2 number, since 2×75230649² = 11319301097922402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75230647) 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, 321382 + ... + 321615.

Almost surely, 2^75230649 is an apocalyptic number.

It is an amenable number.

75230649 is a deficient number, since it is larger than the sum of its proper divisors (41794987).

75230649 is a wasteful number, since it uses less digits than its factorization.

75230649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643016 (or 643013 counting only the distinct ones).

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

The square root of 75230649 is about 8673.5603416360. The cubic root of 75230649 is about 422.1481944726.

The spelling of 75230649 in words is "seventy-five million, two hundred thirty thousand, six hundred forty-nine".