617641047 has 6 divisors (see below), whose sum is σ = 892148192. Its totient is φ = 411760692.

The previous prime is 617641033. The next prime is 617641069. The reversal of 617641047 is 740146716.

617641047 is a `hidden beast` number, since 6 + 1 + 7 + 641 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 617641047 - 2⁸ = 617640791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617641007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34313383 + ... + 34313400.

Almost surely, 2^617641047 is an apocalyptic number.

617641047 is a deficient number, since it is larger than the sum of its proper divisors (274507145).

617641047 is a wasteful number, since it uses less digits than its factorization.

617641047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68626789 (or 68626786 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 617641047 is about 24852.3851370447. The cubic root of 617641047 is about 851.6190810270.

The spelling of 617641047 in words is "six hundred seventeen million, six hundred forty-one thousand, forty-seven".