617640319 has 2 divisors, whose sum is σ = 617640320. Its totient is φ = 617640318.

The previous prime is 617640271. The next prime is 617640341. The reversal of 617640319 is 913046716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 617640319 - 2¹⁷ = 617509247 is a prime.

It is a super-2 number, since 2×617640319² = 762959127308843522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617640349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308820159 + 308820160.

It is an arithmetic number, because the mean of its divisors is an integer number (308820160).

Almost surely, 2^617640319 is an apocalyptic number.

617640319 is a deficient number, since it is larger than the sum of its proper divisors (1).

617640319 is an equidigital number, since it uses as much as digits as its factorization.

617640319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 617640319 is about 24852.3704905588. The cubic root of 617640319 is about 851.6187464320.

The spelling of 617640319 in words is "six hundred seventeen million, six hundred forty thousand, three hundred nineteen".