1010100391 has 2 divisors, whose sum is σ = 1010100392. Its totient is φ = 1010100390.

The previous prime is 1010100367. The next prime is 1010100397. The reversal of 1010100391 is 1930010101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1010100391 - 2¹⁷ = 1009969319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010100397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505050195 + 505050196.

It is an arithmetic number, because the mean of its divisors is an integer number (505050196).

Almost surely, 2^1010100391 is an apocalyptic number.

1010100391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010100391 is an equidigital number, since it uses as much as digits as its factorization.

1010100391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1010100391 is about 31782.0765684057. The cubic root of 1010100391 is about 1003.3555248590.

Adding to 1010100391 its reverse (1930010101), we get a palindrome (2940110492).

The spelling of 1010100391 in words is "one billion, ten million, one hundred thousand, three hundred ninety-one".