675369721 has 8 divisors (see below), whose sum is σ = 727677440. Its totient is φ = 623112912.

The previous prime is 675369701. The next prime is 675369749. The reversal of 675369721 is 127963576.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 675369721 - 2⁷ = 675369593 is a prime.

It is a super-2 number, since 2×675369721² = 912248520087235682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675369701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17506 + ... + 40708.

It is an arithmetic number, because the mean of its divisors is an integer number (90959680).

Almost surely, 2^675369721 is an apocalyptic number.

It is an amenable number.

675369721 is a deficient number, since it is larger than the sum of its proper divisors (52307719).

675369721 is a wasteful number, since it uses less digits than its factorization.

675369721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25455.

The product of its digits is 476280, while the sum is 46.

The square root of 675369721 is about 25987.8764234402. The cubic root of 675369721 is about 877.3654508627.

The spelling of 675369721 in words is "six hundred seventy-five million, three hundred sixty-nine thousand, seven hundred twenty-one".