1138217471 has 4 divisors (see below), whose sum is σ = 1162434912. Its totient is φ = 1114000032.

The previous prime is 1138217459. The next prime is 1138217489. The reversal of 1138217471 is 1747128311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1747128311 = 71 ⋅24607441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138217471 is a prime.

It is a super-3 number, since 3×1138217471³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138214471) 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, 12108650 + ... + 12108743.

It is an arithmetic number, because the mean of its divisors is an integer number (290608728).

Almost surely, 2^1138217471 is an apocalyptic number.

1138217471 is a deficient number, since it is larger than the sum of its proper divisors (24217441).

1138217471 is an equidigital number, since it uses as much as digits as its factorization.

1138217471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24217440.

The product of its digits is 9408, while the sum is 35.

The square root of 1138217471 is about 33737.4787291522. The cubic root of 1138217471 is about 1044.0991667397.

The spelling of 1138217471 in words is "one billion, one hundred thirty-eight million, two hundred seventeen thousand, four hundred seventy-one".