621207449 has 2 divisors, whose sum is σ = 621207450. Its totient is φ = 621207448.

The previous prime is 621207427. The next prime is 621207473. The reversal of 621207449 is 944702126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544382224 + 76825225 = 23332^2 + 8765^2 .

It is a cyclic number.

It is not a de Polignac number, because 621207449 - 2⁸ = 621207193 is a prime.

It is not a weakly prime, because it can be changed into another prime (621207949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310603724 + 310603725.

It is an arithmetic number, because the mean of its divisors is an integer number (310603725).

Almost surely, 2^621207449 is an apocalyptic number.

It is an amenable number.

621207449 is a deficient number, since it is larger than the sum of its proper divisors (1).

621207449 is an equidigital number, since it uses as much as digits as its factorization.

621207449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 621207449 is about 24924.0335620060. The cubic root of 621207449 is about 853.2550845642.

The spelling of 621207449 in words is "six hundred twenty-one million, two hundred seven thousand, four hundred forty-nine".