650897881 has 2 divisors, whose sum is σ = 650897882. Its totient is φ = 650897880.

The previous prime is 650897873. The next prime is 650897893. The reversal of 650897881 is 188798056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608855625 + 42042256 = 24675^2 + 6484^2 .

It is a cyclic number.

It is not a de Polignac number, because 650897881 - 2³ = 650897873 is a prime.

It is a super-2 number, since 2×650897881² = 847336102980580322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (650897281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325448940 + 325448941.

It is an arithmetic number, because the mean of its divisors is an integer number (325448941).

Almost surely, 2^650897881 is an apocalyptic number.

It is an amenable number.

650897881 is a deficient number, since it is larger than the sum of its proper divisors (1).

650897881 is an equidigital number, since it uses as much as digits as its factorization.

650897881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 650897881 is about 25512.7003862782. The cubic root of 650897881 is about 866.6377831761.

The spelling of 650897881 in words is "six hundred fifty million, eight hundred ninety-seven thousand, eight hundred eighty-one".