1157073309 has 24 divisors (see below), whose sum is σ = 1994051520. Its totient is φ = 661183992.

The previous prime is 1157073301. The next prime is 1157073353. The reversal of 1157073309 is 9033707511.

1157073309 is a `hidden beast` number, since 11 + 570 + 73 + 3 + 0 + 9 = 666.

It is not a de Polignac number, because 1157073309 - 2³ = 1157073301 is a prime.

It is a super-3 number, since 3×1157073309³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157073301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435969 + ... + 438614.

It is an arithmetic number, because the mean of its divisors is an integer number (83085480).

Almost surely, 2^1157073309 is an apocalyptic number.

It is an amenable number.

1157073309 is a deficient number, since it is larger than the sum of its proper divisors (836978211).

1157073309 is an equidigital number, since it uses as much as digits as its factorization.

1157073309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874606 (or 874593 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 36.

The square root of 1157073309 is about 34015.7802938577. The cubic root of 1157073309 is about 1049.8331734956.

The spelling of 1157073309 in words is "one billion, one hundred fifty-seven million, seventy-three thousand, three hundred nine".