1420578617 has 2 divisors, whose sum is σ = 1420578618. Its totient is φ = 1420578616.

The previous prime is 1420578589. The next prime is 1420578631. The reversal of 1420578617 is 7168750241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020738601 + 399840016 = 31949^2 + 19996^2 .

It is an emirp because it is prime and its reverse (7168750241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420578617 - 2²² = 1416384313 is a prime.

It is a super-3 number, since 3×1420578617³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1420578637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710289308 + 710289309.

It is an arithmetic number, because the mean of its divisors is an integer number (710289309).

Almost surely, 2^1420578617 is an apocalyptic number.

It is an amenable number.

1420578617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420578617 is an equidigital number, since it uses as much as digits as its factorization.

1420578617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 1420578617 is about 37690.5640313328. The cubic root of 1420578617 is about 1124.1435106017.

The spelling of 1420578617 in words is "one billion, four hundred twenty million, five hundred seventy-eight thousand, six hundred seventeen".