87654551 has 2 divisors, whose sum is σ = 87654552. Its totient is φ = 87654550.

The previous prime is 87654547. The next prime is 87654563. The reversal of 87654551 is 15545678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87654551 - 2² = 87654547 is a prime.

It is a super-2 number, since 2×87654551² = 15366640622023202, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87654499 and 87654508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87654521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43827275 + 43827276.

It is an arithmetic number, because the mean of its divisors is an integer number (43827276).

Almost surely, 2^87654551 is an apocalyptic number.

87654551 is a deficient number, since it is larger than the sum of its proper divisors (1).

87654551 is an equidigital number, since it uses as much as digits as its factorization.

87654551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168000, while the sum is 41.

The square root of 87654551 is about 9362.4009207040. The cubic root of 87654551 is about 444.2132308453.

The spelling of 87654551 in words is "eighty-seven million, six hundred fifty-four thousand, five hundred fifty-one".