248654639 has 2 divisors, whose sum is σ = 248654640. Its totient is φ = 248654638.

The previous prime is 248654629. The next prime is 248654657. The reversal of 248654639 is 936456842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248654639 - 2²⁴ = 231877423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 248654593 and 248654602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248654629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124327319 + 124327320.

It is an arithmetic number, because the mean of its divisors is an integer number (124327320).

Almost surely, 2^248654639 is an apocalyptic number.

248654639 is a deficient number, since it is larger than the sum of its proper divisors (1).

248654639 is an equidigital number, since it uses as much as digits as its factorization.

248654639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 47.

The square root of 248654639 is about 15768.7868588551. The cubic root of 248654639 is about 628.8284593675.

The spelling of 248654639 in words is "two hundred forty-eight million, six hundred fifty-four thousand, six hundred thirty-nine".