138000961 has 4 divisors (see below), whose sum is σ = 157715392. Its totient is φ = 118286532.

The previous prime is 138000953. The next prime is 138000979. The reversal of 138000961 is 169000831.

It is a happy number.

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 not a de Polignac number, because 138000961 - 2³ = 138000953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138000901) 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, 9857205 + ... + 9857218.

It is an arithmetic number, because the mean of its divisors is an integer number (39428848).

Almost surely, 2^138000961 is an apocalyptic number.

It is an amenable number.

138000961 is a deficient number, since it is larger than the sum of its proper divisors (19714431).

138000961 is an equidigital number, since it uses as much as digits as its factorization.

138000961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714430.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 138000961 is about 11747.3810272758. The cubic root of 138000961 is about 516.7661247773.

The spelling of 138000961 in words is "one hundred thirty-eight million, nine hundred sixty-one", and thus it is an aban number.