39478477429 has 2 divisors, whose sum is σ = 39478477430. Its totient is φ = 39478477428.

The previous prime is 39478477417. The next prime is 39478477447. The reversal of 39478477429 is 92477487493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37060100100 + 2418377329 = 192510^2 + 49177^2 .

It is a cyclic number.

It is not a de Polignac number, because 39478477429 - 2²⁵ = 39444922997 is a prime.

It is a super-2 number, since 2×39478477429² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39478477729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19739238714 + 19739238715.

It is an arithmetic number, because the mean of its divisors is an integer number (19739238715).

Almost surely, 2^39478477429 is an apocalyptic number.

It is an amenable number.

39478477429 is a deficient number, since it is larger than the sum of its proper divisors (1).

39478477429 is an equidigital number, since it uses as much as digits as its factorization.

39478477429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 64.

The spelling of 39478477429 in words is "thirty-nine billion, four hundred seventy-eight million, four hundred seventy-seven thousand, four hundred twenty-nine".