1138575473 has 4 divisors (see below), whose sum is σ = 1301229120. Its totient is φ = 975921828.

The previous prime is 1138575419. The next prime is 1138575479. The reversal of 1138575473 is 3745758311.

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 not a de Polignac number, because 1138575473 - 2¹² = 1138571377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138575479) 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, 81326813 + ... + 81326826.

It is an arithmetic number, because the mean of its divisors is an integer number (325307280).

Almost surely, 2^1138575473 is an apocalyptic number.

It is an amenable number.

1138575473 is a deficient number, since it is larger than the sum of its proper divisors (162653647).

1138575473 is an equidigital number, since it uses as much as digits as its factorization.

1138575473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162653646.

The product of its digits is 352800, while the sum is 44.

The square root of 1138575473 is about 33742.7840137710. The cubic root of 1138575473 is about 1044.2086216307.

The spelling of 1138575473 in words is "one billion, one hundred thirty-eight million, five hundred seventy-five thousand, four hundred seventy-three".