1002135731 has 2 divisors, whose sum is σ = 1002135732. Its totient is φ = 1002135730.

The previous prime is 1002135697. The next prime is 1002135733. The reversal of 1002135731 is 1375312001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002135731 is a prime.

It is a super-2 number, since 2×1002135731² = 2008552046693808722, which contains 22 as substring.

Together with 1002135733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002135697 and 1002135706.

It is not a weakly prime, because it can be changed into another prime (1002135733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501067865 + 501067866.

It is an arithmetic number, because the mean of its divisors is an integer number (501067866).

Almost surely, 2^1002135731 is an apocalyptic number.

1002135731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002135731 is an equidigital number, since it uses as much as digits as its factorization.

1002135731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 1002135731 is about 31656.5274627524. The cubic root of 1002135731 is about 1000.7114041175.

Adding to 1002135731 its reverse (1375312001), we get a palindrome (2377447732).

The spelling of 1002135731 in words is "one billion, two million, one hundred thirty-five thousand, seven hundred thirty-one".