7280121487 has 2 divisors, whose sum is σ = 7280121488. Its totient is φ = 7280121486.

The previous prime is 7280121461. The next prime is 7280121553. The reversal of 7280121487 is 7841210827.

It is a weak prime.

It is an emirp because it is prime and its reverse (7841210827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7280121487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7280121427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640060743 + 3640060744.

It is an arithmetic number, because the mean of its divisors is an integer number (3640060744).

Almost surely, 2^7280121487 is an apocalyptic number.

7280121487 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280121487 is an equidigital number, since it uses as much as digits as its factorization.

7280121487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 7280121487 is about 85323.6279526369. The cubic root of 7280121487 is about 1938.1149975089.

The spelling of 7280121487 in words is "seven billion, two hundred eighty million, one hundred twenty-one thousand, four hundred eighty-seven".