621409337 has 2 divisors, whose sum is σ = 621409338. Its totient is φ = 621409336.

The previous prime is 621409319. The next prime is 621409351. The reversal of 621409337 is 733904126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509811241 + 111598096 = 22579^2 + 10564^2 .

It is a cyclic number.

It is not a de Polignac number, because 621409337 - 2⁶ = 621409273 is a prime.

It is a super-2 number, since 2×621409337² = 772299128221559138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621409297 and 621409306.

It is not a weakly prime, because it can be changed into another prime (621409357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310704668 + 310704669.

It is an arithmetic number, because the mean of its divisors is an integer number (310704669).

Almost surely, 2^621409337 is an apocalyptic number.

It is an amenable number.

621409337 is a deficient number, since it is larger than the sum of its proper divisors (1).

621409337 is an equidigital number, since it uses as much as digits as its factorization.

621409337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 621409337 is about 24928.0832997645. The cubic root of 621409337 is about 853.3475084959.

The spelling of 621409337 in words is "six hundred twenty-one million, four hundred nine thousand, three hundred thirty-seven".