248911989 has 16 divisors (see below), whose sum is σ = 360622080. Its totient is φ = 152135280.

The previous prime is 248911979. The next prime is 248912023. The reversal of 248911989 is 989119842.

It is not a de Polignac number, because 248911989 - 2¹³ = 248903797 is a prime.

It is a super-2 number, since 2×248911989² = 123914356535872242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248911979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68667 + ... + 72200.

It is an arithmetic number, because the mean of its divisors is an integer number (22538880).

Almost surely, 2^248911989 is an apocalyptic number.

It is an amenable number.

248911989 is a deficient number, since it is larger than the sum of its proper divisors (111710091).

248911989 is a wasteful number, since it uses less digits than its factorization.

248911989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140920.

The product of its digits is 373248, while the sum is 51.

The square root of 248911989 is about 15776.9448563402. The cubic root of 248911989 is about 629.0453240214.

The spelling of 248911989 in words is "two hundred forty-eight million, nine hundred eleven thousand, nine hundred eighty-nine".