653947934 has 4 divisors (see below), whose sum is σ = 980921904. Its totient is φ = 326973966.

The previous prime is 653947933. The next prime is 653947949. The reversal of 653947934 is 439749356.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653947933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163486982 + ... + 163486985.

It is an arithmetic number, because the mean of its divisors is an integer number (245230476).

Almost surely, 2^653947934 is an apocalyptic number.

653947934 is a deficient number, since it is larger than the sum of its proper divisors (326973970).

653947934 is a wasteful number, since it uses less digits than its factorization.

653947934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326973969.

The product of its digits is 2449440, while the sum is 50.

The square root of 653947934 is about 25572.4057139722. The cubic root of 653947934 is about 867.9893383203.

The spelling of 653947934 in words is "six hundred fifty-three million, nine hundred forty-seven thousand, nine hundred thirty-four".