617420407 has 2 divisors, whose sum is σ = 617420408. Its totient is φ = 617420406.

The previous prime is 617420387. The next prime is 617420413. The reversal of 617420407 is 704024716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617420407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617420417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308710203 + 308710204.

It is an arithmetic number, because the mean of its divisors is an integer number (308710204).

Almost surely, 2^617420407 is an apocalyptic number.

617420407 is a deficient number, since it is larger than the sum of its proper divisors (1).

617420407 is an equidigital number, since it uses as much as digits as its factorization.

617420407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 617420407 is about 24847.9457299794. The cubic root of 617420407 is about 851.5176609471.

The spelling of 617420407 in words is "six hundred seventeen million, four hundred twenty thousand, four hundred seven".