13453439477 has 2 divisors, whose sum is σ = 13453439478. Its totient is φ = 13453439476.

The previous prime is 13453439399. The next prime is 13453439491. The reversal of 13453439477 is 77493435431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13398294001 + 55145476 = 115751^2 + 7426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13453439477 is a prime.

It is a super-2 number, since 2×13453439477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13453430477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726719738 + 6726719739.

It is an arithmetic number, because the mean of its divisors is an integer number (6726719739).

Almost surely, 2^13453439477 is an apocalyptic number.

It is an amenable number.

13453439477 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453439477 is an equidigital number, since it uses as much as digits as its factorization.

13453439477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 50.

The spelling of 13453439477 in words is "thirteen billion, four hundred fifty-three million, four hundred thirty-nine thousand, four hundred seventy-seven".