118438947 has 24 divisors (see below), whose sum is σ = 186973488. Its totient is φ = 71649600.

The previous prime is 118438939. The next prime is 118438973. The reversal of 118438947 is 749834811.

It is a happy number.

It is not a de Polignac number, because 118438947 - 2³ = 118438939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118438907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99697 + ... + 100877.

It is an arithmetic number, because the mean of its divisors is an integer number (7790562).

Almost surely, 2^118438947 is an apocalyptic number.

118438947 is a deficient number, since it is larger than the sum of its proper divisors (68534541).

118438947 is a wasteful number, since it uses less digits than its factorization.

118438947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2208 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 118438947 is about 10882.9659100817. The cubic root of 118438947 is about 491.0942462153.

The spelling of 118438947 in words is "one hundred eighteen million, four hundred thirty-eight thousand, nine hundred forty-seven".