748781409 has 12 divisors (see below), whose sum is σ = 1031623728. Its totient is φ = 483082920.

The previous prime is 748781381. The next prime is 748781417. The reversal of 748781409 is 904187847.

It is not a de Polignac number, because 748781409 - 2⁸ = 748781153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (748781909) 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, 126979 + ... + 132744.

It is an arithmetic number, because the mean of its divisors is an integer number (85968644).

Almost surely, 2^748781409 is an apocalyptic number.

It is an amenable number.

748781409 is a deficient number, since it is larger than the sum of its proper divisors (282842319).

748781409 is a wasteful number, since it uses less digits than its factorization.

748781409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259788 (or 259757 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 748781409 is about 27363.8705047367. The cubic root of 748781409 is about 908.0679570484.

The spelling of 748781409 in words is "seven hundred forty-eight million, seven hundred eighty-one thousand, four hundred nine".