820888951 has 2 divisors, whose sum is σ = 820888952. Its totient is φ = 820888950.

The previous prime is 820888949. The next prime is 820888969. The reversal of 820888951 is 159888028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820888951 - 2¹ = 820888949 is a prime.

Together with 820888949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 820888895 and 820888904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820883951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410444475 + 410444476.

It is an arithmetic number, because the mean of its divisors is an integer number (410444476).

Almost surely, 2^820888951 is an apocalyptic number.

820888951 is a deficient number, since it is larger than the sum of its proper divisors (1).

820888951 is an equidigital number, since it uses as much as digits as its factorization.

820888951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 368640, while the sum is 49.

The square root of 820888951 is about 28651.1596798454. The cubic root of 820888951 is about 936.3282716233.

The spelling of 820888951 in words is "eight hundred twenty million, eight hundred eighty-eight thousand, nine hundred fifty-one".