1457215993 has 2 divisors, whose sum is σ = 1457215994. Its totient is φ = 1457215992.

The previous prime is 1457215967. The next prime is 1457216063. The reversal of 1457215993 is 3995127541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850480569 + 606735424 = 29163^2 + 24632^2 .

It is an emirp because it is prime and its reverse (3995127541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1457215993 - 2¹⁷ = 1457084921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1457215943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728607996 + 728607997.

It is an arithmetic number, because the mean of its divisors is an integer number (728607997).

Almost surely, 2^1457215993 is an apocalyptic number.

It is an amenable number.

1457215993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457215993 is an equidigital number, since it uses as much as digits as its factorization.

1457215993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 46.

The square root of 1457215993 is about 38173.4985690335. The cubic root of 1457215993 is about 1133.7256601258.

The spelling of 1457215993 in words is "one billion, four hundred fifty-seven million, two hundred fifteen thousand, nine hundred ninety-three".