1157170087 has 2 divisors, whose sum is σ = 1157170088. Its totient is φ = 1157170086.

The previous prime is 1157170081. The next prime is 1157170099. The reversal of 1157170087 is 7800717511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157170087 is a prime.

It is a super-2 number, since 2×1157170087² = 2678085220495175138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157170081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578585043 + 578585044.

It is an arithmetic number, because the mean of its divisors is an integer number (578585044).

Almost surely, 2^1157170087 is an apocalyptic number.

1157170087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157170087 is an equidigital number, since it uses as much as digits as its factorization.

1157170087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13720, while the sum is 37.

The square root of 1157170087 is about 34017.2028097549. The cubic root of 1157170087 is about 1049.8624421460.

Adding to 1157170087 its reverse (7800717511), we get a palindrome (8957887598).

The spelling of 1157170087 in words is "one billion, one hundred fifty-seven million, one hundred seventy thousand, eighty-seven".