1357493947 has 2 divisors, whose sum is σ = 1357493948. Its totient is φ = 1357493946.

The previous prime is 1357493941. The next prime is 1357493993. The reversal of 1357493947 is 7493947531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1357493947 - 2²³ = 1349105339 is a prime.

It is a super-3 number, since 3×1357493947³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1357493894 and 1357493903.

It is not a weakly prime, because it can be changed into another prime (1357493941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678746973 + 678746974.

It is an arithmetic number, because the mean of its divisors is an integer number (678746974).

Almost surely, 2^1357493947 is an apocalyptic number.

1357493947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357493947 is an equidigital number, since it uses as much as digits as its factorization.

1357493947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 52.

The square root of 1357493947 is about 36844.1847107518. The cubic root of 1357493947 is about 1107.2507095336.

The spelling of 1357493947 in words is "one billion, three hundred fifty-seven million, four hundred ninety-three thousand, nine hundred forty-seven".