617246891 has 2 divisors, whose sum is σ = 617246892. Its totient is φ = 617246890.

The previous prime is 617246881. The next prime is 617246963. The reversal of 617246891 is 198642716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 617246891 - 2¹⁸ = 616984747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (617246801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308623445 + 308623446.

It is an arithmetic number, because the mean of its divisors is an integer number (308623446).

Almost surely, 2^617246891 is an apocalyptic number.

617246891 is a deficient number, since it is larger than the sum of its proper divisors (1).

617246891 is an equidigital number, since it uses as much as digits as its factorization.

617246891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 617246891 is about 24844.4539283921. The cubic root of 617246891 is about 851.4378850601.

The spelling of 617246891 in words is "six hundred seventeen million, two hundred forty-six thousand, eight hundred ninety-one".