87149077 has 4 divisors (see below), whose sum is σ = 88626240. Its totient is φ = 85671916.

The previous prime is 87149071. The next prime is 87149081. The reversal of 87149077 is 77094178.

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 not a de Polignac number, because 87149077 - 2¹¹ = 87147029 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 (87149071) 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, 738493 + ... + 738610.

It is an arithmetic number, because the mean of its divisors is an integer number (22156560).

Almost surely, 2^87149077 is an apocalyptic number.

It is an amenable number.

87149077 is a deficient number, since it is larger than the sum of its proper divisors (1477163).

87149077 is a wasteful number, since it uses less digits than its factorization.

87149077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477162.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 87149077 is about 9335.3669986777. The cubic root of 87149077 is about 443.3577086616.

The spelling of 87149077 in words is "eighty-seven million, one hundred forty-nine thousand, seventy-seven".