1391653 has 2 divisors, whose sum is σ = 1391654. Its totient is φ = 1391652.

The previous prime is 1391651. The next prime is 1391669. The reversal of 1391653 is 3561931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1387684 + 3969 = 1178^2 + 63^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391653 - 2¹ = 1391651 is a prime.

Together with 1391651, 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 (1391651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695826 + 695827.

It is an arithmetic number, because the mean of its divisors is an integer number (695827).

2^1391653 is an apocalyptic number.

It is an amenable number.

1391653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391653 is an equidigital number, since it uses as much as digits as its factorization.

1391653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 28.

The square root of 1391653 is about 1179.6834321122. The cubic root of 1391653 is about 111.6461247826.

The spelling of 1391653 in words is "one million, three hundred ninety-one thousand, six hundred fifty-three".