620622131 has 2 divisors, whose sum is σ = 620622132. Its totient is φ = 620622130.

The previous prime is 620622109. The next prime is 620622161. The reversal of 620622131 is 131226026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620622131 - 2²² = 616427827 is a prime.

It is a super-2 number, since 2×620622131² = 770343658973962322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 620622097 and 620622106.

It is not a weakly prime, because it can be changed into another prime (620622161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310311065 + 310311066.

It is an arithmetic number, because the mean of its divisors is an integer number (310311066).

Almost surely, 2^620622131 is an apocalyptic number.

620622131 is a deficient number, since it is larger than the sum of its proper divisors (1).

620622131 is an equidigital number, since it uses as much as digits as its factorization.

620622131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 620622131 is about 24912.2887547491. The cubic root of 620622131 is about 852.9870138900.

Adding to 620622131 its reverse (131226026), we get a palindrome (751848157).

The spelling of 620622131 in words is "six hundred twenty million, six hundred twenty-two thousand, one hundred thirty-one".