653199923 has 2 divisors, whose sum is σ = 653199924. Its totient is φ = 653199922.

The previous prime is 653199901. The next prime is 653199979. The reversal of 653199923 is 329991356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653199923 - 2¹² = 653195827 is a prime.

It is not a weakly prime, because it can be changed into another prime (653199983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326599961 + 326599962.

It is an arithmetic number, because the mean of its divisors is an integer number (326599962).

Almost surely, 2^653199923 is an apocalyptic number.

653199923 is a deficient number, since it is larger than the sum of its proper divisors (1).

653199923 is an equidigital number, since it uses as much as digits as its factorization.

653199923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 47.

The square root of 653199923 is about 25557.7761747770. The cubic root of 653199923 is about 867.6582654381.

The spelling of 653199923 in words is "six hundred fifty-three million, one hundred ninety-nine thousand, nine hundred twenty-three".