1087155949 has 8 divisors (see below), whose sum is σ = 1186240320. Its totient is φ = 988113600.

The previous prime is 1087155917. The next prime is 1087155961. The reversal of 1087155949 is 9495517801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1087155949 - 2⁵ = 1087155917 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 (1087155149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71392 + ... + 85270.

It is an arithmetic number, because the mean of its divisors is an integer number (148280040).

Almost surely, 2^1087155949 is an apocalyptic number.

It is an amenable number.

1087155949 is a deficient number, since it is larger than the sum of its proper divisors (99084371).

1087155949 is a wasteful number, since it uses less digits than its factorization.

1087155949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21011.

The product of its (nonzero) digits is 453600, while the sum is 49.

The square root of 1087155949 is about 32972.0479952338. The cubic root of 1087155949 is about 1028.2466002014.

The spelling of 1087155949 in words is "one billion, eighty-seven million, one hundred fifty-five thousand, nine hundred forty-nine".