7401972509 has 2 divisors, whose sum is σ = 7401972510. Its totient is φ = 7401972508.

The previous prime is 7401972503. The next prime is 7401972511. The reversal of 7401972509 is 9052791047.

7401972509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5412544900 + 1989427609 = 73570^2 + 44603^2 .

It is a cyclic number.

It is not a de Polignac number, because 7401972509 - 2¹⁶ = 7401906973 is a prime.

Together with 7401972511, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7401972509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7401972503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3700986254 + 3700986255.

It is an arithmetic number, because the mean of its divisors is an integer number (3700986255).

Almost surely, 2^7401972509 is an apocalyptic number.

It is an amenable number.

7401972509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7401972509 is an equidigital number, since it uses as much as digits as its factorization.

7401972509 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 7401972509 is about 86034.7168821982. The cubic root of 7401972509 is about 1948.8682899811.

The spelling of 7401972509 in words is "seven billion, four hundred one million, nine hundred seventy-two thousand, five hundred nine".