1016215997 has 2 divisors, whose sum is σ = 1016215998. Its totient is φ = 1016215996.

The previous prime is 1016215979. The next prime is 1016216039. The reversal of 1016215997 is 7995126101.

Together with previous prime (1016215979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553707961 + 462508036 = 23531^2 + 21506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016215997 - 2⁶ = 1016215933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1016215097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508107998 + 508107999.

It is an arithmetic number, because the mean of its divisors is an integer number (508107999).

Almost surely, 2^1016215997 is an apocalyptic number.

It is an amenable number.

1016215997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016215997 is an equidigital number, since it uses as much as digits as its factorization.

1016215997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 41.

The square root of 1016215997 is about 31878.1429352464. The cubic root of 1016215997 is about 1005.3763751218.

The spelling of 1016215997 in words is "one billion, sixteen million, two hundred fifteen thousand, nine hundred ninety-seven".