1357846397 has 4 divisors (see below), whose sum is σ = 1380106236. Its totient is φ = 1335586560.

The previous prime is 1357846367. The next prime is 1357846409. The reversal of 1357846397 is 7936487531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 504855961 + 852990436 = 22469^2 + 29206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1357846397 - 2²⁰ = 1356797821 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 (1357846327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11129828 + ... + 11129949.

It is an arithmetic number, because the mean of its divisors is an integer number (345026559).

Almost surely, 2^1357846397 is an apocalyptic number.

It is an amenable number.

1357846397 is a deficient number, since it is larger than the sum of its proper divisors (22259839).

1357846397 is an equidigital number, since it uses as much as digits as its factorization.

1357846397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22259838.

The product of its digits is 3810240, while the sum is 53.

The square root of 1357846397 is about 36848.9673803758. The cubic root of 1357846397 is about 1107.3465274547.

The spelling of 1357846397 in words is "one billion, three hundred fifty-seven million, eight hundred forty-six thousand, three hundred ninety-seven".