19951093 has 2 divisors, whose sum is σ = 19951094. Its totient is φ = 19951092.

The previous prime is 19951069. The next prime is 19951123. The reversal of 19951093 is 39015991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14085009 + 5866084 = 3753^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19951093 is a prime.

It is a super-2 number, since 2×19951093² = 796092223789298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19951493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9975546 + 9975547.

It is an arithmetic number, because the mean of its divisors is an integer number (9975547).

Almost surely, 2^19951093 is an apocalyptic number.

It is an amenable number.

19951093 is a deficient number, since it is larger than the sum of its proper divisors (1).

19951093 is an equidigital number, since it uses as much as digits as its factorization.

19951093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 19951093 is about 4466.6646393030. The cubic root of 19951093 is about 271.2203243601.

The spelling of 19951093 in words is "nineteen million, nine hundred fifty-one thousand, ninety-three".