1157646379 has 4 divisors (see below), whose sum is σ = 1159860376. Its totient is φ = 1155432384.

The previous prime is 1157646359. The next prime is 1157646431. The reversal of 1157646379 is 9736467511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1157646379 - 2¹³ = 1157638187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157646359) 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, 1106214 + ... + 1107259.

It is an arithmetic number, because the mean of its divisors is an integer number (289965094).

Almost surely, 2^1157646379 is an apocalyptic number.

1157646379 is a deficient number, since it is larger than the sum of its proper divisors (2213997).

1157646379 is an equidigital number, since it uses as much as digits as its factorization.

1157646379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213996.

The product of its digits is 952560, while the sum is 49.

The square root of 1157646379 is about 34024.2028415068. The cubic root of 1157646379 is about 1050.0064637546.

It can be divided in two parts, 1157646 and 379, that multiplied together give a palindrome (438747834).

The spelling of 1157646379 in words is "one billion, one hundred fifty-seven million, six hundred forty-six thousand, three hundred seventy-nine".