398878069013 has 4 divisors (see below), whose sum is σ = 399470756268. Its totient is φ = 398285381760.

The previous prime is 398878068931. The next prime is 398878069103. The reversal of 398878069013 is 310960878893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160209668644 + 238668400369 = 400262^2 + 488537^2 .

It is a cyclic number.

It is not a de Polignac number, because 398878069013 - 2¹⁸ = 398877806869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398878060013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296342618 + ... + 296343963.

It is an arithmetic number, because the mean of its divisors is an integer number (99867689067).

Almost surely, 2^398878069013 is an apocalyptic number.

It is an amenable number.

398878069013 is a deficient number, since it is larger than the sum of its proper divisors (592687255).

398878069013 is an equidigital number, since it uses as much as digits as its factorization.

398878069013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592687254.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 398878069013 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, sixty-nine thousand, thirteen".