138774901 has 8 divisors (see below), whose sum is σ = 142672824. Its totient is φ = 134884800.

The previous prime is 138774871. The next prime is 138774943. The reversal of 138774901 is 109477831.

It can be written as a sum of positive squares in 4 ways, for example, as 6754801 + 132020100 = 2599^2 + 11490^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 138774901 - 2⁵ = 138774869 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 (138774001) 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, 69351 + ... + 71323.

It is an arithmetic number, because the mean of its divisors is an integer number (17834103).

Almost surely, 2^138774901 is an apocalyptic number.

It is an amenable number.

138774901 is a deficient number, since it is larger than the sum of its proper divisors (3897923).

138774901 is a wasteful number, since it uses less digits than its factorization.

138774901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 138774901 is about 11780.2759305544. The cubic root of 138774901 is about 517.7303708004.

The spelling of 138774901 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, nine hundred one".