987509157 has 4 divisors (see below), whose sum is σ = 1316678880. Its totient is φ = 658339436.

The previous prime is 987509113. The next prime is 987509161. The reversal of 987509157 is 751905789.

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 987509157 - 2¹⁶ = 987443621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987509177) 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, 164584857 + ... + 164584862.

It is an arithmetic number, because the mean of its divisors is an integer number (329169720).

Almost surely, 2^987509157 is an apocalyptic number.

It is an amenable number.

987509157 is a deficient number, since it is larger than the sum of its proper divisors (329169723).

987509157 is a wasteful number, since it uses less digits than its factorization.

987509157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329169722.

The product of its (nonzero) digits is 793800, while the sum is 51.

The square root of 987509157 is about 31424.6584229646. The cubic root of 987509157 is about 995.8189286728.

The spelling of 987509157 in words is "nine hundred eighty-seven million, five hundred nine thousand, one hundred fifty-seven".