1008648139 has 4 divisors (see below), whose sum is σ = 1015328080. Its totient is φ = 1001968200.

The previous prime is 1008648107. The next prime is 1008648167. The reversal of 1008648139 is 9318468001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1008648139 - 2⁵ = 1008648107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1008648169) 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, 3339744 + ... + 3340045.

It is an arithmetic number, because the mean of its divisors is an integer number (253832020).

Almost surely, 2^1008648139 is an apocalyptic number.

1008648139 is a deficient number, since it is larger than the sum of its proper divisors (6679941).

1008648139 is an equidigital number, since it uses as much as digits as its factorization.

1008648139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679940.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1008648139 is about 31759.2213223183. The cubic root of 1008648139 is about 1002.8744426628.

The spelling of 1008648139 in words is "one billion, eight million, six hundred forty-eight thousand, one hundred thirty-nine".