647381901 has 8 divisors (see below), whose sum is σ = 881541504. Its totient is φ = 422405120.

The previous prime is 647381893. The next prime is 647381941. The reversal of 647381901 is 109183746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647381901 - 2³ = 647381893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647381901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647381941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2295540 + ... + 2295821.

It is an arithmetic number, because the mean of its divisors is an integer number (110192688).

Almost surely, 2^647381901 is an apocalyptic number.

It is an amenable number.

647381901 is a deficient number, since it is larger than the sum of its proper divisors (234159603).

647381901 is a wasteful number, since it uses less digits than its factorization.

647381901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591411.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 647381901 is about 25443.7006152800. The cubic root of 647381901 is about 865.0745148366.

The spelling of 647381901 in words is "six hundred forty-seven million, three hundred eighty-one thousand, nine hundred one".