1008919457 has 12 divisors (see below), whose sum is σ = 1263921876. Its totient is φ = 798265440.

The previous prime is 1008919447. The next prime is 1008919463. The reversal of 1008919457 is 7549198001.

It can be written as a sum of positive squares in 2 ways, for example, as 626951521 + 381967936 = 25039^2 + 19544^2 .

It is not a de Polignac number, because 1008919457 - 2⁶ = 1008919393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1008919447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 791294 + ... + 792567.

It is an arithmetic number, because the mean of its divisors is an integer number (105326823).

Almost surely, 2^1008919457 is an apocalyptic number.

It is an amenable number.

1008919457 is a deficient number, since it is larger than the sum of its proper divisors (255002419).

1008919457 is a wasteful number, since it uses less digits than its factorization.

1008919457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583888 (or 1583881 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1008919457 is about 31763.4925189281. The cubic root of 1008919457 is about 1002.9643562424.

The spelling of 1008919457 in words is "one billion, eight million, nine hundred nineteen thousand, four hundred fifty-seven".