951611861 has 2 divisors, whose sum is σ = 951611862. Its totient is φ = 951611860.

The previous prime is 951611833. The next prime is 951611863. The reversal of 951611861 is 168116159.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883218961 + 68392900 = 29719^2 + 8270^2 .

It is a cyclic number.

It is not a de Polignac number, because 951611861 - 2⁶ = 951611797 is a prime.

Together with 951611863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (951611863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475805930 + 475805931.

It is an arithmetic number, because the mean of its divisors is an integer number (475805931).

Almost surely, 2^951611861 is an apocalyptic number.

It is an amenable number.

951611861 is a deficient number, since it is larger than the sum of its proper divisors (1).

951611861 is an equidigital number, since it uses as much as digits as its factorization.

951611861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 951611861 is about 30848.2067712209. The cubic root of 951611861 is about 983.6032359051.

The spelling of 951611861 in words is "nine hundred fifty-one million, six hundred eleven thousand, eight hundred sixty-one".