870807551 has 2 divisors, whose sum is σ = 870807552. Its totient is φ = 870807550.

The previous prime is 870807533. The next prime is 870807589. The reversal of 870807551 is 155708078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 870807551 - 2¹⁸ = 870545407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870807499 and 870807508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870807851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435403775 + 435403776.

It is an arithmetic number, because the mean of its divisors is an integer number (435403776).

Almost surely, 2^870807551 is an apocalyptic number.

870807551 is a deficient number, since it is larger than the sum of its proper divisors (1).

870807551 is an equidigital number, since it uses as much as digits as its factorization.

870807551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 870807551 is about 29509.4485038267. The cubic root of 870807551 is about 954.9355515109.

The spelling of 870807551 in words is "eight hundred seventy million, eight hundred seven thousand, five hundred fifty-one".