7539474457 has 2 divisors, whose sum is σ = 7539474458. Its totient is φ = 7539474456.

The previous prime is 7539474353. The next prime is 7539474463. The reversal of 7539474457 is 7544749357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4884751881 + 2654722576 = 69891^2 + 51524^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7539474457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7539474398 and 7539474407.

It is not a weakly prime, because it can be changed into another prime (7539414457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3769737228 + 3769737229.

It is an arithmetic number, because the mean of its divisors is an integer number (3769737229).

Almost surely, 2^7539474457 is an apocalyptic number.

It is an amenable number.

7539474457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7539474457 is an equidigital number, since it uses as much as digits as its factorization.

7539474457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14817600, while the sum is 55.

The square root of 7539474457 is about 86830.1471667531. The cubic root of 7539474457 is about 1960.8619748296.

The spelling of 7539474457 in words is "seven billion, five hundred thirty-nine million, four hundred seventy-four thousand, four hundred fifty-seven".