139006001 has 4 divisors (see below), whose sum is σ = 140963904. Its totient is φ = 137048100.

The previous prime is 139005989. The next prime is 139006013. The reversal of 139006001 is 100600931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100600931 = 97 ⋅1037123.

It is an interprime number because it is at equal distance from previous prime (139005989) and next prime (139006013).

It is a cyclic number.

It is not a de Polignac number, because 139006001 - 2²² = 134811697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139006051) 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, 978845 + ... + 978986.

It is an arithmetic number, because the mean of its divisors is an integer number (35240976).

Almost surely, 2^139006001 is an apocalyptic number.

It is an amenable number.

139006001 is a deficient number, since it is larger than the sum of its proper divisors (1957903).

139006001 is an equidigital number, since it uses as much as digits as its factorization.

139006001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957902.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 139006001 is about 11790.0806188932. The cubic root of 139006001 is about 518.0176012564.

Adding to 139006001 its reverse (100600931), we get a palindrome (239606932).

The spelling of 139006001 in words is "one hundred thirty-nine million, six thousand, one".