2621439497 has 2 divisors, whose sum is σ = 2621439498. Its totient is φ = 2621439496.

The previous prime is 2621439479. The next prime is 2621439511. The reversal of 2621439497 is 7949341262.

Together with previous prime (2621439479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1629252496 + 992187001 = 40364^2 + 31499^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621439497 - 2⁶ = 2621439433 is a prime.

It is a super-2 number, since 2×2621439497² = 13743890072863226018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2621439407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310719748 + 1310719749.

It is an arithmetic number, because the mean of its divisors is an integer number (1310719749).

Almost surely, 2^2621439497 is an apocalyptic number.

It is an amenable number.

2621439497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621439497 is an equidigital number, since it uses as much as digits as its factorization.

2621439497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 2621439497 is about 51199.9950878904. The cubic root of 2621439497 is about 1378.8381134302.

The spelling of 2621439497 in words is "two billion, six hundred twenty-one million, four hundred thirty-nine thousand, four hundred ninety-seven".