653378929 has 4 divisors (see below), whose sum is σ = 746718784. Its totient is φ = 560039076.

The previous prime is 653378899. The next prime is 653378939. The reversal of 653378929 is 929873356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 653378929 - 2⁹ = 653378417 is a prime.

It is a super-2 number, since 2×653378929² = 853808049722374082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (653378939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46669917 + ... + 46669930.

It is an arithmetic number, because the mean of its divisors is an integer number (186679696).

Almost surely, 2^653378929 is an apocalyptic number.

It is an amenable number.

653378929 is a deficient number, since it is larger than the sum of its proper divisors (93339855).

653378929 is an equidigital number, since it uses as much as digits as its factorization.

653378929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93339854.

The product of its digits is 2449440, while the sum is 52.

The square root of 653378929 is about 25561.2779218880. The cubic root of 653378929 is about 867.7375172589.

The spelling of 653378929 in words is "six hundred fifty-three million, three hundred seventy-eight thousand, nine hundred twenty-nine".