621846131 has 2 divisors, whose sum is σ = 621846132. Its totient is φ = 621846130.

The previous prime is 621846109. The next prime is 621846133. The reversal of 621846131 is 131648126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621846131 - 2⁶ = 621846067 is a prime.

It is a super-2 number, since 2×621846131² = 773385221279338322, which contains 22 as substring.

Together with 621846133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621846133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310923065 + 310923066.

It is an arithmetic number, because the mean of its divisors is an integer number (310923066).

Almost surely, 2^621846131 is an apocalyptic number.

621846131 is a deficient number, since it is larger than the sum of its proper divisors (1).

621846131 is an equidigital number, since it uses as much as digits as its factorization.

621846131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 621846131 is about 24936.8428434716. The cubic root of 621846131 is about 853.5474034499.

The spelling of 621846131 in words is "six hundred twenty-one million, eight hundred forty-six thousand, one hundred thirty-one".