900543653 has 4 divisors (see below), whose sum is σ = 902472480. Its totient is φ = 898614828.

The previous prime is 900543647. The next prime is 900543667. The reversal of 900543653 is 356345009.

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: 356345009 = 823 ⋅432983.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900543653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900543643) 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, 963713 + ... + 964646.

It is an arithmetic number, because the mean of its divisors is an integer number (225618120).

Almost surely, 2^900543653 is an apocalyptic number.

It is an amenable number.

900543653 is a deficient number, since it is larger than the sum of its proper divisors (1928827).

900543653 is a wasteful number, since it uses less digits than its factorization.

900543653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928826.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 900543653 is about 30009.0595154197. The cubic root of 900543653 is about 965.6837496232.

The spelling of 900543653 in words is "nine hundred million, five hundred forty-three thousand, six hundred fifty-three".