900127139 has 4 divisors (see below), whose sum is σ = 900672024. Its totient is φ = 899582256.

The previous prime is 900127133. The next prime is 900127181. The reversal of 900127139 is 931721009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931721009 = 2591 ⋅359599.

It is a cyclic number.

It is not a de Polignac number, because 900127139 - 2⁸ = 900126883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900127133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269957 + ... + 273270.

It is an arithmetic number, because the mean of its divisors is an integer number (225168006).

Almost surely, 2^900127139 is an apocalyptic number.

900127139 is a deficient number, since it is larger than the sum of its proper divisors (544885).

900127139 is a wasteful number, since it uses less digits than its factorization.

900127139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544884.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 900127139 is about 30002.1189085038. The cubic root of 900127139 is about 965.5348459298.

The spelling of 900127139 in words is "nine hundred million, one hundred twenty-seven thousand, one hundred thirty-nine".