647311254 has 16 divisors (see below), whose sum is σ = 1313946048. Its totient is φ = 212549832.

The previous prime is 647311237. The next prime is 647311267. The reversal of 647311254 is 452113746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804712 + ... + 805515.

It is an arithmetic number, because the mean of its divisors is an integer number (82121628).

Almost surely, 2^647311254 is an apocalyptic number.

647311254 is an abundant number, since it is smaller than the sum of its proper divisors (666634794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647311254 is a wasteful number, since it uses less digits than its factorization.

647311254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610299.

The product of its digits is 20160, while the sum is 33.

The square root of 647311254 is about 25442.3122769924. The cubic root of 647311254 is about 865.0430459606.

The spelling of 647311254 in words is "six hundred forty-seven million, three hundred eleven thousand, two hundred fifty-four".