7421500997 has 2 divisors, whose sum is σ = 7421500998. Its totient is φ = 7421500996.

The previous prime is 7421500991. The next prime is 7421501039. The reversal of 7421500997 is 7990051247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7144644676 + 276856321 = 84526^2 + 16639^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421500997 - 2⁸ = 7421500741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7421500991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710750498 + 3710750499.

It is an arithmetic number, because the mean of its divisors is an integer number (3710750499).

Almost surely, 2^7421500997 is an apocalyptic number.

It is an amenable number.

7421500997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421500997 is an equidigital number, since it uses as much as digits as its factorization.

7421500997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 7421500997 is about 86148.1340308657. The cubic root of 7421500997 is about 1950.5806727413.

The spelling of 7421500997 in words is "seven billion, four hundred twenty-one million, five hundred thousand, nine hundred ninety-seven".