8738919731 has 2 divisors, whose sum is σ = 8738919732. Its totient is φ = 8738919730.

The previous prime is 8738919689. The next prime is 8738919737. The reversal of 8738919731 is 1379198378.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8738919731 is a prime.

It is a super-2 number, since 2×8738919731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8738919737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4369459865 + 4369459866.

It is an arithmetic number, because the mean of its divisors is an integer number (4369459866).

Almost surely, 2^8738919731 is an apocalyptic number.

8738919731 is a deficient number, since it is larger than the sum of its proper divisors (1).

8738919731 is an equidigital number, since it uses as much as digits as its factorization.

8738919731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 8738919731 is about 93482.1893785121. The cubic root of 8738919731 is about 2059.7724739282.

The spelling of 8738919731 in words is "eight billion, seven hundred thirty-eight million, nine hundred nineteen thousand, seven hundred thirty-one".