1093998457 has 2 divisors, whose sum is σ = 1093998458. Its totient is φ = 1093998456.

The previous prime is 1093998443. The next prime is 1093998487. The reversal of 1093998457 is 7548993901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091377296 + 2621161 = 33036^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1093998457 - 2¹⁵ = 1093965689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1093998398 and 1093998407.

It is not a weakly prime, because it can be changed into another prime (1093998487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546999228 + 546999229.

It is an arithmetic number, because the mean of its divisors is an integer number (546999229).

Almost surely, 2^1093998457 is an apocalyptic number.

It is an amenable number.

1093998457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1093998457 is an equidigital number, since it uses as much as digits as its factorization.

1093998457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 1093998457 is about 33075.6474917726. The cubic root of 1093998457 is about 1030.3993352117.

The spelling of 1093998457 in words is "one billion, ninety-three million, nine hundred ninety-eight thousand, four hundred fifty-seven".