653997947 has 2 divisors, whose sum is σ = 653997948. Its totient is φ = 653997946.

The previous prime is 653997941. The next prime is 653997989. The reversal of 653997947 is 749799356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653997947 - 2⁸ = 653997691 is a prime.

It is not a weakly prime, because it can be changed into another prime (653997941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326998973 + 326998974.

It is an arithmetic number, because the mean of its divisors is an integer number (326998974).

Almost surely, 2^653997947 is an apocalyptic number.

653997947 is a deficient number, since it is larger than the sum of its proper divisors (1).

653997947 is an equidigital number, since it uses as much as digits as its factorization.

653997947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12859560, while the sum is 59.

The square root of 653997947 is about 25573.3835657310. The cubic root of 653997947 is about 868.0114652828.

The spelling of 653997947 in words is "six hundred fifty-three million, nine hundred ninety-seven thousand, nine hundred forty-seven".