398967599 has 4 divisors (see below), whose sum is σ = 399218400. Its totient is φ = 398716800.

The previous prime is 398967589. The next prime is 398967607. The reversal of 398967599 is 995769893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995769893 = 97 ⋅10265669.

It is a cyclic number.

It is not a de Polignac number, because 398967599 - 2²⁴ = 382190383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398967589) 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, 122999 + ... + 126200.

It is an arithmetic number, because the mean of its divisors is an integer number (99804600).

Almost surely, 2^398967599 is an apocalyptic number.

398967599 is a deficient number, since it is larger than the sum of its proper divisors (250801).

398967599 is a wasteful number, since it uses less digits than its factorization.

398967599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250800.

The product of its digits is 33067440, while the sum is 65.

The square root of 398967599 is about 19974.1732995386. The cubic root of 398967599 is about 736.1718539454.

The spelling of 398967599 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, five hundred ninety-nine".