87435251 has 2 divisors, whose sum is σ = 87435252. Its totient is φ = 87435250.

The previous prime is 87435241. The next prime is 87435269. The reversal of 87435251 is 15253478.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87435251 is a prime.

It is a Chen prime.

It is equal to p_5076917 and since 87435251 and 5076917 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (87435241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43717625 + 43717626.

It is an arithmetic number, because the mean of its divisors is an integer number (43717626).

Almost surely, 2^87435251 is an apocalyptic number.

87435251 is a deficient number, since it is larger than the sum of its proper divisors (1).

87435251 is an equidigital number, since it uses as much as digits as its factorization.

87435251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 87435251 is about 9350.6818467960. The cubic root of 87435251 is about 443.8424673800.

The spelling of 87435251 in words is "eighty-seven million, four hundred thirty-five thousand, two hundred fifty-one".