621485137 has 8 divisors (see below), whose sum is σ = 764904896. Its totient is φ = 491724432.

The previous prime is 621485119. The next prime is 621485153. The reversal of 621485137 is 731584126.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621485137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621485096 and 621485105.

It is not an unprimeable number, because it can be changed into a prime (621485237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3414663 + ... + 3414844.

It is an arithmetic number, because the mean of its divisors is an integer number (95613112).

Almost surely, 2^621485137 is an apocalyptic number.

It is an amenable number.

621485137 is a deficient number, since it is larger than the sum of its proper divisors (143419759).

621485137 is a wasteful number, since it uses less digits than its factorization.

621485137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829527.

The product of its digits is 40320, while the sum is 37.

The square root of 621485137 is about 24929.6036270134. The cubic root of 621485137 is about 853.3822044188.

The spelling of 621485137 in words is "six hundred twenty-one million, four hundred eighty-five thousand, one hundred thirty-seven".