869438951 has 2 divisors, whose sum is σ = 869438952. Its totient is φ = 869438950.

The previous prime is 869438923. The next prime is 869438959. The reversal of 869438951 is 159834968.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869438951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869438893 and 869438902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869438959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434719475 + 434719476.

It is an arithmetic number, because the mean of its divisors is an integer number (434719476).

Almost surely, 2^869438951 is an apocalyptic number.

869438951 is a deficient number, since it is larger than the sum of its proper divisors (1).

869438951 is an equidigital number, since it uses as much as digits as its factorization.

869438951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 869438951 is about 29486.2502024249. The cubic root of 869438951 is about 954.4350160916.

The spelling of 869438951 in words is "eight hundred sixty-nine million, four hundred thirty-eight thousand, nine hundred fifty-one".