1401473989 has 4 divisors (see below), whose sum is σ = 1402716460. Its totient is φ = 1400231520.

The previous prime is 1401473987. The next prime is 1401473993. The reversal of 1401473989 is 9893741041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69588964 + 1331885025 = 8342^2 + 36495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401473989 - 2¹ = 1401473987 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 (1401473987) 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, 619542 + ... + 621799.

It is an arithmetic number, because the mean of its divisors is an integer number (350679115).

Almost surely, 2^1401473989 is an apocalyptic number.

It is an amenable number.

1401473989 is a deficient number, since it is larger than the sum of its proper divisors (1242471).

1401473989 is a wasteful number, since it uses less digits than its factorization.

1401473989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242470.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1401473989 is about 37436.2656925073. The cubic root of 1401473989 is about 1119.0814079957.

The spelling of 1401473989 in words is "one billion, four hundred one million, four hundred seventy-three thousand, nine hundred eighty-nine".