649033143 has 16 divisors (see below), whose sum is σ = 974502912. Its totient is φ = 380664000.

The previous prime is 649033139. The next prime is 649033193. The reversal of 649033143 is 341330946.

It is not a de Polignac number, because 649033143 - 2² = 649033139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649033193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316198 + ... + 318243.

It is an arithmetic number, because the mean of its divisors is an integer number (60906432).

Almost surely, 2^649033143 is an apocalyptic number.

649033143 is a deficient number, since it is larger than the sum of its proper divisors (325469769).

649033143 is a wasteful number, since it uses less digits than its factorization.

649033143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634486.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 649033143 is about 25476.1288856843. The cubic root of 649033143 is about 865.8093899802.

The spelling of 649033143 in words is "six hundred forty-nine million, thirty-three thousand, one hundred forty-three".