87435749 has 4 divisors (see below), whose sum is σ = 87720864. Its totient is φ = 87150636.

The previous prime is 87435721. The next prime is 87435763. The reversal of 87435749 is 94753478.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87435749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87435149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142097 + ... + 142710.

It is an arithmetic number, because the mean of its divisors is an integer number (21930216).

Almost surely, 2^87435749 is an apocalyptic number.

It is an amenable number.

87435749 is a deficient number, since it is larger than the sum of its proper divisors (285115).

87435749 is a wasteful number, since it uses less digits than its factorization.

87435749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285114.

The product of its digits is 846720, while the sum is 47.

The square root of 87435749 is about 9350.7084758322. The cubic root of 87435749 is about 443.8433100346.

The spelling of 87435749 in words is "eighty-seven million, four hundred thirty-five thousand, seven hundred forty-nine".