1356489457 has 2 divisors, whose sum is σ = 1356489458. Its totient is φ = 1356489456.

The previous prime is 1356489451. The next prime is 1356489509. The reversal of 1356489457 is 7549846531.

It is an a-pointer prime, because the next prime (1356489509) can be obtained adding 1356489457 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245313521 + 111175936 = 35289^2 + 10544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356489457 - 2²³ = 1348100849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1356489451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678244728 + 678244729.

It is an arithmetic number, because the mean of its divisors is an integer number (678244729).

Almost surely, 2^1356489457 is an apocalyptic number.

It is an amenable number.

1356489457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356489457 is an equidigital number, since it uses as much as digits as its factorization.

1356489457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 52.

The square root of 1356489457 is about 36830.5505932236. The cubic root of 1356489457 is about 1106.9775353970.

The spelling of 1356489457 in words is "one billion, three hundred fifty-six million, four hundred eighty-nine thousand, four hundred fifty-seven".