951216649 has 2 divisors, whose sum is σ = 951216650. Its totient is φ = 951216648.

The previous prime is 951216647. The next prime is 951216653. The reversal of 951216649 is 946612159.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842160400 + 109056249 = 29020^2 + 10443^2 .

It is a cyclic number.

It is not a de Polignac number, because 951216649 - 2¹ = 951216647 is a prime.

It is a super-2 number, since 2×951216649² = 1809626226669578402, which contains 22 as substring.

Together with 951216647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (951216641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475608324 + 475608325.

It is an arithmetic number, because the mean of its divisors is an integer number (475608325).

Almost surely, 2^951216649 is an apocalyptic number.

It is an amenable number.

951216649 is a deficient number, since it is larger than the sum of its proper divisors (1).

951216649 is an equidigital number, since it uses as much as digits as its factorization.

951216649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 951216649 is about 30841.8003527680. The cubic root of 951216649 is about 983.4670509593.

The spelling of 951216649 in words is "nine hundred fifty-one million, two hundred sixteen thousand, six hundred forty-nine".