398364501 has 4 divisors (see below), whose sum is σ = 531152672. Its totient is φ = 265576332.

The previous prime is 398364497. The next prime is 398364509. The reversal of 398364501 is 105463893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105463893 = 3 ⋅35154631.

It is not a de Polignac number, because 398364501 - 2² = 398364497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398364501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398364509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66394081 + ... + 66394086.

It is an arithmetic number, because the mean of its divisors is an integer number (132788168).

Almost surely, 2^398364501 is an apocalyptic number.

It is an amenable number.

398364501 is a deficient number, since it is larger than the sum of its proper divisors (132788171).

398364501 is a wasteful number, since it uses less digits than its factorization.

398364501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132788170.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 398364501 is about 19959.0706446969. The cubic root of 398364501 is about 735.8007229918.

The spelling of 398364501 in words is "three hundred ninety-eight million, three hundred sixty-four thousand, five hundred one".