1631369 has 2 divisors, whose sum is σ = 1631370. Its totient is φ = 1631368.

The previous prime is 1631363. The next prime is 1631407. The reversal of 1631369 is 9631361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1471369 + 160000 = 1213^2 + 400^2 .

It is an emirp because it is prime and its reverse (9631361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1631369 - 2¹⁶ = 1565833 is a prime.

It is a super-2 number, since 2×1631369² = 5322729628322, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1631363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815684 + 815685.

It is an arithmetic number, because the mean of its divisors is an integer number (815685).

2^1631369 is an apocalyptic number.

It is an amenable number.

1631369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631369 is an equidigital number, since it uses as much as digits as its factorization.

1631369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 29.

The square root of 1631369 is about 1277.2505627323. The cubic root of 1631369 is about 117.7201305707.

The spelling of 1631369 in words is "one million, six hundred thirty-one thousand, three hundred sixty-nine".