621415049 has 2 divisors, whose sum is σ = 621415050. Its totient is φ = 621415048.

The previous prime is 621414979. The next prime is 621415051. The reversal of 621415049 is 940514126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607277449 + 14137600 = 24643^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 621415049 - 2¹⁶ = 621349513 is a prime.

Together with 621415051, 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 (621415099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310707524 + 310707525.

It is an arithmetic number, because the mean of its divisors is an integer number (310707525).

Almost surely, 2^621415049 is an apocalyptic number.

It is an amenable number.

621415049 is a deficient number, since it is larger than the sum of its proper divisors (1).

621415049 is an equidigital number, since it uses as much as digits as its factorization.

621415049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 621415049 is about 24928.1978690799. The cubic root of 621415049 is about 853.3501231472.

The spelling of 621415049 in words is "six hundred twenty-one million, four hundred fifteen thousand, forty-nine".