1493725481 has 2 divisors, whose sum is σ = 1493725482. Its totient is φ = 1493725480.

The previous prime is 1493725433. The next prime is 1493725517. The reversal of 1493725481 is 1845273941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1452829456 + 40896025 = 38116^2 + 6395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1493725481 is a prime.

It is a super-2 number, since 2×1493725481² = 4462431625177362722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1493715481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746862740 + 746862741.

It is an arithmetic number, because the mean of its divisors is an integer number (746862741).

Almost surely, 2^1493725481 is an apocalyptic number.

It is an amenable number.

1493725481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493725481 is an equidigital number, since it uses as much as digits as its factorization.

1493725481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 1493725481 is about 38648.7448825961. The cubic root of 1493725481 is about 1143.1158937808.

The spelling of 1493725481 in words is "one billion, four hundred ninety-three million, seven hundred twenty-five thousand, four hundred eighty-one".