451947653 has 4 divisors (see below), whose sum is σ = 452155008. Its totient is φ = 451740300.

The previous prime is 451947649. The next prime is 451947659. The reversal of 451947653 is 356749154.

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, and also an emirpimes, since its reverse is a distinct semiprime: 356749154 = 2 ⋅178374577.

It is a cyclic number.

It is not a de Polignac number, because 451947653 - 2² = 451947649 is a prime.

It is a super-3 number, since 3×451947653³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451947659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100373 + ... + 104778.

It is an arithmetic number, because the mean of its divisors is an integer number (113038752).

Almost surely, 2^451947653 is an apocalyptic number.

It is an amenable number.

451947653 is a deficient number, since it is larger than the sum of its proper divisors (207355).

451947653 is a wasteful number, since it uses less digits than its factorization.

451947653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207354.

The product of its digits is 453600, while the sum is 44.

The square root of 451947653 is about 21259.0604919408. The cubic root of 451947653 is about 767.4134003802.

The spelling of 451947653 in words is "four hundred fifty-one million, nine hundred forty-seven thousand, six hundred fifty-three".