248621139 has 36 divisors (see below), whose sum is σ = 391145664. Its totient is φ = 152103744.

The previous prime is 248621123. The next prime is 248621179. The reversal of 248621139 is 931126842.

248621139 is a `hidden beast` number, since 24 + 8 + 621 + 1 + 3 + 9 = 666.

248621139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 248621139 - 2⁴ = 248621123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (248621119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 338817 + ... + 339549.

Almost surely, 2^248621139 is an apocalyptic number.

248621139 is a deficient number, since it is larger than the sum of its proper divisors (142524525).

248621139 is a wasteful number, since it uses less digits than its factorization.

248621139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 972 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 248621139 is about 15767.7245980516. The cubic root of 248621139 is about 628.8002184580.

The spelling of 248621139 in words is "two hundred forty-eight million, six hundred twenty-one thousand, one hundred thirty-nine".