398878090739 has 2 divisors, whose sum is σ = 398878090740. Its totient is φ = 398878090738.

The previous prime is 398878090657. The next prime is 398878090747. The reversal of 398878090739 is 937090878893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398878090739 - 2³⁶ = 330158614003 is a prime.

It is a super-2 number, since 2×398878090739² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (398878090759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199439045369 + 199439045370.

It is an arithmetic number, because the mean of its divisors is an integer number (199439045370).

Almost surely, 2^398878090739 is an apocalyptic number.

398878090739 is a deficient number, since it is larger than the sum of its proper divisors (1).

398878090739 is an equidigital number, since it uses as much as digits as its factorization.

398878090739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164602368, while the sum is 71.

The spelling of 398878090739 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, ninety thousand, seven hundred thirty-nine".