1994913751 has 2 divisors, whose sum is σ = 1994913752. Its totient is φ = 1994913750.

The previous prime is 1994913743. The next prime is 1994913769. The reversal of 1994913751 is 1573194991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1994913751 - 2³ = 1994913743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1994913695 and 1994913704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994910751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997456875 + 997456876.

It is an arithmetic number, because the mean of its divisors is an integer number (997456876).

Almost surely, 2^1994913751 is an apocalyptic number.

1994913751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994913751 is an equidigital number, since it uses as much as digits as its factorization.

1994913751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 49.

The square root of 1994913751 is about 44664.4573570529. The cubic root of 1994913751 is about 1258.8520978594.

The spelling of 1994913751 in words is "one billion, nine hundred ninety-four million, nine hundred thirteen thousand, seven hundred fifty-one".