653261397 has 8 divisors (see below), whose sum is σ = 922251456. Its totient is φ = 409889472.

The previous prime is 653261351. The next prime is 653261407. The reversal of 653261397 is 793162356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 653261397 - 2¹² = 653257301 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653261327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6404473 + ... + 6404574.

It is an arithmetic number, because the mean of its divisors is an integer number (115281432).

Almost surely, 2^653261397 is an apocalyptic number.

It is an amenable number.

653261397 is a deficient number, since it is larger than the sum of its proper divisors (268990059).

653261397 is a wasteful number, since it uses less digits than its factorization.

653261397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12809067.

The product of its digits is 204120, while the sum is 42.

The square root of 653261397 is about 25558.9787941537. The cubic root of 653261397 is about 867.6854836241.

The spelling of 653261397 in words is "six hundred fifty-three million, two hundred sixty-one thousand, three hundred ninety-seven".