138170641 has 12 divisors (see below), whose sum is σ = 169189680. Its totient is φ = 112197960.

The previous prime is 138170633. The next prime is 138170657. The reversal of 138170641 is 146071831.

It is not a de Polignac number, because 138170641 - 2³ = 138170633 is a prime.

It is a super-2 number, since 2×138170641² = 38182252068701762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138170671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73275 + ... + 75136.

It is an arithmetic number, because the mean of its divisors is an integer number (14099140).

Almost surely, 2^138170641 is an apocalyptic number.

It is an amenable number.

138170641 is a deficient number, since it is larger than the sum of its proper divisors (31019039).

138170641 is a wasteful number, since it uses less digits than its factorization.

138170641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148444 (or 148437 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 138170641 is about 11754.6008439249. The cubic root of 138170641 is about 516.9778357734.

The spelling of 138170641 in words is "one hundred thirty-eight million, one hundred seventy thousand, six hundred forty-one".