653739091 has 2 divisors, whose sum is σ = 653739092. Its totient is φ = 653739090.

The previous prime is 653739049. The next prime is 653739109. The reversal of 653739091 is 190937356.

It is a happy number.

Together with next prime (653739109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 653739091 - 2¹⁹ = 653214803 is a prime.

It is not a weakly prime, because it can be changed into another prime (653739011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326869545 + 326869546.

It is an arithmetic number, because the mean of its divisors is an integer number (326869546).

Almost surely, 2^653739091 is an apocalyptic number.

653739091 is a deficient number, since it is larger than the sum of its proper divisors (1).

653739091 is an equidigital number, since it uses as much as digits as its factorization.

653739091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 653739091 is about 25568.3220215954. The cubic root of 653739091 is about 867.8969289259.

The spelling of 653739091 in words is "six hundred fifty-three million, seven hundred thirty-nine thousand, ninety-one".