1001495813 has 2 divisors, whose sum is σ = 1001495814. Its totient is φ = 1001495812.

The previous prime is 1001495767. The next prime is 1001495821. The reversal of 1001495813 is 3185941001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977062564 + 24433249 = 31258^2 + 4943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001495813 - 2⁶ = 1001495749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001495813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001495213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500747906 + 500747907.

It is an arithmetic number, because the mean of its divisors is an integer number (500747907).

Almost surely, 2^1001495813 is an apocalyptic number.

It is an amenable number.

1001495813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001495813 is an equidigital number, since it uses as much as digits as its factorization.

1001495813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1001495813 is about 31646.4186441373. The cubic root of 1001495813 is about 1000.4983559334.

The spelling of 1001495813 in words is "one billion, one million, four hundred ninety-five thousand, eight hundred thirteen".