538628947 has 4 divisors (see below), whose sum is σ = 538699480. Its totient is φ = 538558416.

The previous prime is 538628939. The next prime is 538628957. The reversal of 538628947 is 749826835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749826835 = 5 ⋅149965367.

It is a cyclic number.

It is not a de Polignac number, because 538628947 - 2³ = 538628939 is a prime.

It is a super-2 number, since 2×538628947² = 580242285092657618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 538628894 and 538628903.

It is not an unprimeable number, because it can be changed into a prime (538628917) 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 3 ways as a sum of consecutive naturals, for example, 22197 + ... + 39622.

It is an arithmetic number, because the mean of its divisors is an integer number (134674870).

Almost surely, 2^538628947 is an apocalyptic number.

538628947 is a deficient number, since it is larger than the sum of its proper divisors (70533).

538628947 is an equidigital number, since it uses as much as digits as its factorization.

538628947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70532.

The product of its digits is 2903040, while the sum is 52.

The square root of 538628947 is about 23208.3809646429. The cubic root of 538628947 is about 813.6355137611.

The spelling of 538628947 in words is "five hundred thirty-eight million, six hundred twenty-eight thousand, nine hundred forty-seven".