720621475 has 24 divisors (see below), whose sum is σ = 1031164160. Its totient is φ = 489330720.

The previous prime is 720621463. The next prime is 720621553. The reversal of 720621475 is 574126027.

It is not a de Polignac number, because 720621475 - 2¹⁹ = 720097187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720621475.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1965 + ... + 38014.

Almost surely, 2^720621475 is an apocalyptic number.

720621475 is a deficient number, since it is larger than the sum of its proper divisors (310542685).

720621475 is a wasteful number, since it uses less digits than its factorization.

720621475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40099 (or 40094 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 720621475 is about 26844.3937350055. The cubic root of 720621475 is about 896.5387530221.

It can be divided in two parts, 72062 and 1475, that added together give a palindrome (73537).

The spelling of 720621475 in words is "seven hundred twenty million, six hundred twenty-one thousand, four hundred seventy-five".