653401381 has 2 divisors, whose sum is σ = 653401382. Its totient is φ = 653401380.

The previous prime is 653401367. The next prime is 653401453. The reversal of 653401381 is 183104356.

653401381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 645617281 + 7784100 = 25409^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 653401381 - 2¹¹ = 653399333 is a prime.

It is a super-2 number, since 2×653401381² = 853866729385414322, which contains 22 as substring.

It is equal to p_33961027 and since 653401381 and 33961027 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653401321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326700690 + 326700691.

It is an arithmetic number, because the mean of its divisors is an integer number (326700691).

Almost surely, 2^653401381 is an apocalyptic number.

It is an amenable number.

653401381 is a deficient number, since it is larger than the sum of its proper divisors (1).

653401381 is an equidigital number, since it uses as much as digits as its factorization.

653401381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 653401381 is about 25561.7170980355. The cubic root of 653401381 is about 867.7474564732.

The spelling of 653401381 in words is "six hundred fifty-three million, four hundred one thousand, three hundred eighty-one".