1401632389 has 2 divisors, whose sum is σ = 1401632390. Its totient is φ = 1401632388.

The previous prime is 1401632387. The next prime is 1401632399. The reversal of 1401632389 is 9832361041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364933025 + 36699364 = 36945^2 + 6058^2 .

It is an emirp because it is prime and its reverse (9832361041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1401632389 - 2¹ = 1401632387 is a prime.

Together with 1401632387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401632387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700816194 + 700816195.

It is an arithmetic number, because the mean of its divisors is an integer number (700816195).

Almost surely, 2^1401632389 is an apocalyptic number.

It is an amenable number.

1401632389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401632389 is an equidigital number, since it uses as much as digits as its factorization.

1401632389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1401632389 is about 37438.3812283598. The cubic root of 1401632389 is about 1119.1235673742.

The spelling of 1401632389 in words is "one billion, four hundred one million, six hundred thirty-two thousand, three hundred eighty-nine".