248978747 has 4 divisors (see below), whose sum is σ = 249216696. Its totient is φ = 248740800.

The previous prime is 248978711. The next prime is 248978777. The reversal of 248978747 is 747879842.

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: 747879842 = 2 ⋅373939921.

It is a cyclic number.

It is not a de Polignac number, because 248978747 - 2⁸ = 248978491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 248978692 and 248978701.

It is not an unprimeable number, because it can be changed into a prime (248978777) 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, 117398 + ... + 119499.

It is an arithmetic number, because the mean of its divisors is an integer number (62304174).

Almost surely, 2^248978747 is an apocalyptic number.

248978747 is a deficient number, since it is larger than the sum of its proper divisors (237949).

248978747 is a wasteful number, since it uses less digits than its factorization.

248978747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237948.

The product of its digits is 6322176, while the sum is 56.

The square root of 248978747 is about 15779.0603966142. The cubic root of 248978747 is about 629.1015554820.

The spelling of 248978747 in words is "two hundred forty-eight million, nine hundred seventy-eight thousand, seven hundred forty-seven".