650779361 has 4 divisors (see below), whose sum is σ = 650967300. Its totient is φ = 650591424.

The previous prime is 650779331. The next prime is 650779387. The reversal of 650779361 is 163977056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 373223761 + 277555600 = 19319^2 + 16660^2 .

It is a cyclic number.

It is not a de Polignac number, because 650779361 - 2²⁶ = 583670497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650779301) 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, 88676 + ... + 95733.

It is an arithmetic number, because the mean of its divisors is an integer number (162741825).

Almost surely, 2^650779361 is an apocalyptic number.

It is an amenable number.

650779361 is a deficient number, since it is larger than the sum of its proper divisors (187939).

650779361 is a wasteful number, since it uses less digits than its factorization.

650779361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187938.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 650779361 is about 25510.3775158268. The cubic root of 650779361 is about 866.5851788440.

The spelling of 650779361 in words is "six hundred fifty million, seven hundred seventy-nine thousand, three hundred sixty-one".