501628493 has 4 divisors (see below), whose sum is σ = 504950688. Its totient is φ = 498306300.

The previous prime is 501628489. The next prime is 501628507. The reversal of 501628493 is 394826105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501628493 - 2² = 501628489 is a prime.

It is a super-2 number, since 2×501628493² = 503262289978902098, 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 (501628403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660871 + ... + 1661172.

It is an arithmetic number, because the mean of its divisors is an integer number (126237672).

Almost surely, 2^501628493 is an apocalyptic number.

It is an amenable number.

501628493 is a deficient number, since it is larger than the sum of its proper divisors (3322195).

501628493 is a wasteful number, since it uses less digits than its factorization.

501628493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322194.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 501628493 is about 22397.0643835303. The cubic root of 501628493 is about 794.5612826690.

The spelling of 501628493 in words is "five hundred one million, six hundred twenty-eight thousand, four hundred ninety-three".