1398861433 has 4 divisors (see below), whose sum is σ = 1408125568. Its totient is φ = 1389597300.

The previous prime is 1398861421. The next prime is 1398861461. The reversal of 1398861433 is 3341688931.

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: 3341688931 = 7 ⋅477384133.

It is a cyclic number.

It is not a de Polignac number, because 1398861433 - 2¹³ = 1398853241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398861463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4631841 + ... + 4632142.

It is an arithmetic number, because the mean of its divisors is an integer number (352031392).

Almost surely, 2^1398861433 is an apocalyptic number.

It is an amenable number.

1398861433 is a deficient number, since it is larger than the sum of its proper divisors (9264135).

1398861433 is an equidigital number, since it uses as much as digits as its factorization.

1398861433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264134.

The product of its digits is 373248, while the sum is 46.

The square root of 1398861433 is about 37401.3560315666. The cubic root of 1398861433 is about 1118.3855973782.

The spelling of 1398861433 in words is "one billion, three hundred ninety-eight million, eight hundred sixty-one thousand, four hundred thirty-three".