39475857493 has 2 divisors, whose sum is σ = 39475857494. Its totient is φ = 39475857492.

The previous prime is 39475857469. The next prime is 39475857497.

39475857493 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22740036804 + 16735820689 = 150798^2 + 129367^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 39475857493 - 2⁵ = 39475857461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39475857497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19737928746 + 19737928747.

It is an arithmetic number, because the mean of its divisors is an integer number (19737928747).

Almost surely, 2^39475857493 is an apocalyptic number.

It is an amenable number.

39475857493 is a deficient number, since it is larger than the sum of its proper divisors (1).

39475857493 is an equidigital number, since it uses as much as digits as its factorization.

39475857493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 64.

It can be divided in two parts, 3947585 and 7493, that added together give a triangular number (3955078 = T₂₈₁₂).

The spelling of 39475857493 in words is "thirty-nine billion, four hundred seventy-five million, eight hundred fifty-seven thousand, four hundred ninety-three".