621132877 has 2 divisors, whose sum is σ = 621132878. Its totient is φ = 621132876.

The previous prime is 621132793. The next prime is 621132887. The reversal of 621132877 is 778231126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483164361 + 137968516 = 21981^2 + 11746^2 .

It is a cyclic number.

It is not a de Polignac number, because 621132877 - 2⁷ = 621132749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621132887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310566438 + 310566439.

It is an arithmetic number, because the mean of its divisors is an integer number (310566439).

Almost surely, 2^621132877 is an apocalyptic number.

It is an amenable number.

621132877 is a deficient number, since it is larger than the sum of its proper divisors (1).

621132877 is an equidigital number, since it uses as much as digits as its factorization.

621132877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 621132877 is about 24922.5375313189. The cubic root of 621132877 is about 853.2209405841.

The spelling of 621132877 in words is "six hundred twenty-one million, one hundred thirty-two thousand, eight hundred seventy-seven".