1951113389 has 2 divisors, whose sum is σ = 1951113390. Its totient is φ = 1951113388.

The previous prime is 1951113361. The next prime is 1951113403. The reversal of 1951113389 is 9833111591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1775948164 + 175165225 = 42142^2 + 13235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1951113389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1951113349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975556694 + 975556695.

It is an arithmetic number, because the mean of its divisors is an integer number (975556695).

Almost surely, 2^1951113389 is an apocalyptic number.

It is an amenable number.

1951113389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951113389 is an equidigital number, since it uses as much as digits as its factorization.

1951113389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 41.

The square root of 1951113389 is about 44171.4091806001. The cubic root of 1951113389 is about 1249.5707089042.

The spelling of 1951113389 in words is "one billion, nine hundred fifty-one million, one hundred thirteen thousand, three hundred eighty-nine".