87905749 has 4 divisors (see below), whose sum is σ = 89018560. Its totient is φ = 86792940.

The previous prime is 87905731. The next prime is 87905767. The reversal of 87905749 is 94750978.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (87905731) and next prime (87905767).

It is a cyclic number.

It is not a de Polignac number, because 87905749 - 2⁷ = 87905621 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 (87905449) 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, 556287 + ... + 556444.

It is an arithmetic number, because the mean of its divisors is an integer number (22254640).

Almost surely, 2^87905749 is an apocalyptic number.

It is an amenable number.

87905749 is a deficient number, since it is larger than the sum of its proper divisors (1112811).

87905749 is a wasteful number, since it uses less digits than its factorization.

87905749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112810.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 87905749 is about 9375.8065786363. The cubic root of 87905749 is about 444.6371641547.

The spelling of 87905749 in words is "eighty-seven million, nine hundred five thousand, seven hundred forty-nine".