1993416731 has 2 divisors, whose sum is σ = 1993416732. Its totient is φ = 1993416730.

The previous prime is 1993416713. The next prime is 1993416751. The reversal of 1993416731 is 1376143991.

Together with previous prime (1993416713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1993416731 - 2²² = 1989222427 is a prime.

It is a super-2 number, since 2×1993416731² = 7947420526861452722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1993416751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996708365 + 996708366.

It is an arithmetic number, because the mean of its divisors is an integer number (996708366).

Almost surely, 2^1993416731 is an apocalyptic number.

1993416731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993416731 is an equidigital number, since it uses as much as digits as its factorization.

1993416731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 1993416731 is about 44647.6956964186. The cubic root of 1993416731 is about 1258.5371304650.

The spelling of 1993416731 in words is "one billion, nine hundred ninety-three million, four hundred sixteen thousand, seven hundred thirty-one".