919847237423 has 2 divisors, whose sum is σ = 919847237424. Its totient is φ = 919847237422.

The previous prime is 919847237383. The next prime is 919847237431. The reversal of 919847237423 is 324732748919.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 919847237423 - 2²⁰ = 919846188847 is a prime.

It is a super-2 number, since 2×919847237423² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919847237483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459923618711 + 459923618712.

It is an arithmetic number, because the mean of its divisors is an integer number (459923618712).

Almost surely, 2^919847237423 is an apocalyptic number.

919847237423 is a deficient number, since it is larger than the sum of its proper divisors (1).

919847237423 is an equidigital number, since it uses as much as digits as its factorization.

919847237423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 59.

The spelling of 919847237423 in words is "nine hundred nineteen billion, eight hundred forty-seven million, two hundred thirty-seven thousand, four hundred twenty-three".