620169643 has 2 divisors, whose sum is σ = 620169644. Its totient is φ = 620169642.

The previous prime is 620169637. The next prime is 620169659. The reversal of 620169643 is 346961026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620169643 is a prime.

It is a super-2 number, since 2×620169643² = 769220772197494898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620169623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310084821 + 310084822.

It is an arithmetic number, because the mean of its divisors is an integer number (310084822).

Almost surely, 2^620169643 is an apocalyptic number.

620169643 is a deficient number, since it is larger than the sum of its proper divisors (1).

620169643 is an equidigital number, since it uses as much as digits as its factorization.

620169643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 620169643 is about 24903.2054764040. The cubic root of 620169643 is about 852.7796626920.

The spelling of 620169643 in words is "six hundred twenty million, one hundred sixty-nine thousand, six hundred forty-three".