649958377 has 4 divisors (see below), whose sum is σ = 651439360. Its totient is φ = 648477396.

The previous prime is 649958341. The next prime is 649958401. The reversal of 649958377 is 773859946.

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 a cyclic number.

It is not a de Polignac number, because 649958377 - 2⁷ = 649958249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649958077) 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, 739833 + ... + 740710.

It is an arithmetic number, because the mean of its divisors is an integer number (162859840).

Almost surely, 2^649958377 is an apocalyptic number.

It is an amenable number.

649958377 is a deficient number, since it is larger than the sum of its proper divisors (1480983).

649958377 is a wasteful number, since it uses less digits than its factorization.

649958377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480982.

The product of its digits is 11430720, while the sum is 58.

The square root of 649958377 is about 25494.2812607063. The cubic root of 649958377 is about 866.2206149615.

It can be divided in two parts, 64995837 and 7, that added together give a square (64995844 = 8062²).

The spelling of 649958377 in words is "six hundred forty-nine million, nine hundred fifty-eight thousand, three hundred seventy-seven".