650677381 has 2 divisors, whose sum is σ = 650677382. Its totient is φ = 650677380.

The previous prime is 650677367. The next prime is 650677399. The reversal of 650677381 is 183776056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512614881 + 138062500 = 22641^2 + 11750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650677381 is a prime.

It is a super-2 number, since 2×650677381² = 846762108290038322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650677361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325338690 + 325338691.

It is an arithmetic number, because the mean of its divisors is an integer number (325338691).

Almost surely, 2^650677381 is an apocalyptic number.

It is an amenable number.

650677381 is a deficient number, since it is larger than the sum of its proper divisors (1).

650677381 is an equidigital number, since it uses as much as digits as its factorization.

650677381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 650677381 is about 25508.3786431047. The cubic root of 650677381 is about 866.5399105711.

The spelling of 650677381 in words is "six hundred fifty million, six hundred seventy-seven thousand, three hundred eighty-one".