138452477 has 4 divisors (see below), whose sum is σ = 140205120. Its totient is φ = 136699836.

The previous prime is 138452453. The next prime is 138452507. The reversal of 138452477 is 774254831.

138452477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 138452477 - 2¹² = 138448381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138451477) 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, 876203 + ... + 876360.

It is an arithmetic number, because the mean of its divisors is an integer number (35051280).

Almost surely, 2^138452477 is an apocalyptic number.

It is an amenable number.

138452477 is a deficient number, since it is larger than the sum of its proper divisors (1752643).

138452477 is an equidigital number, since it uses as much as digits as its factorization.

138452477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752642.

The product of its digits is 188160, while the sum is 41.

The square root of 138452477 is about 11766.5830639145. The cubic root of 138452477 is about 517.3291019315.

The spelling of 138452477 in words is "one hundred thirty-eight million, four hundred fifty-two thousand, four hundred seventy-seven".