398008733 has 2 divisors, whose sum is σ = 398008734. Its totient is φ = 398008732.

The previous prime is 398008717. The next prime is 398008739. The reversal of 398008733 is 337800893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388996729 + 9012004 = 19723^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 398008733 - 2⁴ = 398008717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398008739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199004366 + 199004367.

It is an arithmetic number, because the mean of its divisors is an integer number (199004367).

Almost surely, 2^398008733 is an apocalyptic number.

It is an amenable number.

398008733 is a deficient number, since it is larger than the sum of its proper divisors (1).

398008733 is an equidigital number, since it uses as much as digits as its factorization.

398008733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 398008733 is about 19950.1562149272. The cubic root of 398008733 is about 735.5816168571.

The spelling of 398008733 in words is "three hundred ninety-eight million, eight thousand, seven hundred thirty-three".