649157349 has 4 divisors (see below), whose sum is σ = 865543136. Its totient is φ = 432771564.

The previous prime is 649157347. The next prime is 649157351. The reversal of 649157349 is 943751946.

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 an interprime number because it is at equal distance from previous prime (649157347) and next prime (649157351).

It is not a de Polignac number, because 649157349 - 2¹ = 649157347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649157298 and 649157307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649157347) 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, 108192889 + ... + 108192894.

It is an arithmetic number, because the mean of its divisors is an integer number (216385784).

Almost surely, 2^649157349 is an apocalyptic number.

It is an amenable number.

649157349 is a deficient number, since it is larger than the sum of its proper divisors (216385787).

649157349 is a wasteful number, since it uses less digits than its factorization.

649157349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216385786.

The product of its digits is 816480, while the sum is 48.

The square root of 649157349 is about 25478.5664628134. The cubic root of 649157349 is about 865.8646166729.

The spelling of 649157349 in words is "six hundred forty-nine million, one hundred fifty-seven thousand, three hundred forty-nine".