31380653 has 2 divisors, whose sum is σ = 31380654. Its totient is φ = 31380652.

The previous prime is 31380607. The next prime is 31380659. The reversal of 31380653 is 35608313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 5299204 = 5107^2 + 2302^2 .

It is a cyclic number.

It is not a de Polignac number, because 31380653 - 2¹⁰ = 31379629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31380659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15690326 + 15690327.

It is an arithmetic number, because the mean of its divisors is an integer number (15690327).

Almost surely, 2^31380653 is an apocalyptic number.

It is an amenable number.

31380653 is a deficient number, since it is larger than the sum of its proper divisors (1).

31380653 is an equidigital number, since it uses as much as digits as its factorization.

31380653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 31380653 is about 5601.8437143498. The cubic root of 31380653 is about 315.4186187060.

Adding to 31380653 its reverse (35608313), we get a palindrome (66988966).

The spelling of 31380653 in words is "thirty-one million, three hundred eighty thousand, six hundred fifty-three".