919943137 has 2 divisors, whose sum is σ = 919943138. Its totient is φ = 919943136.

The previous prime is 919943131. The next prime is 919943183. The reversal of 919943137 is 731349919.

It is an a-pointer prime, because the next prime (919943183) can be obtained adding 919943137 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 919544976 + 398161 = 30324^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 919943137 - 2¹⁹ = 919418849 is a prime.

It is not a weakly prime, because it can be changed into another prime (919943131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459971568 + 459971569.

It is an arithmetic number, because the mean of its divisors is an integer number (459971569).

Almost surely, 2^919943137 is an apocalyptic number.

It is an amenable number.

919943137 is a deficient number, since it is larger than the sum of its proper divisors (1).

919943137 is an equidigital number, since it uses as much as digits as its factorization.

919943137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 919943137 is about 30330.5644029253. The cubic root of 919943137 is about 972.5687880095.

The spelling of 919943137 in words is "nine hundred nineteen million, nine hundred forty-three thousand, one hundred thirty-seven".