138454557 has 8 divisors (see below), whose sum is σ = 186398784. Its totient is φ = 91406688.

The previous prime is 138454553. The next prime is 138454559. The reversal of 138454557 is 755454831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138454557 - 2² = 138454553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138454553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223728 + ... + 224345.

It is an arithmetic number, because the mean of its divisors is an integer number (23299848).

Almost surely, 2^138454557 is an apocalyptic number.

It is an amenable number.

138454557 is a deficient number, since it is larger than the sum of its proper divisors (47944227).

138454557 is a wasteful number, since it uses less digits than its factorization.

138454557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448179.

The product of its digits is 336000, while the sum is 42.

The square root of 138454557 is about 11766.6714494797. The cubic root of 138454557 is about 517.3316925657.

The spelling of 138454557 in words is "one hundred thirty-eight million, four hundred fifty-four thousand, five hundred fifty-seven".