1010191397 has 4 divisors (see below), whose sum is σ = 1010260320. Its totient is φ = 1010122476.

The previous prime is 1010191393. The next prime is 1010191453. The reversal of 1010191397 is 7931910101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1010191397 - 2² = 1010191393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010191393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747 + ... + 45032.

It is an arithmetic number, because the mean of its divisors is an integer number (252565080).

Almost surely, 2^1010191397 is an apocalyptic number.

It is an amenable number.

1010191397 is a deficient number, since it is larger than the sum of its proper divisors (68923).

1010191397 is an equidigital number, since it uses as much as digits as its factorization.

1010191397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68922.

The product of its (nonzero) digits is 1701, while the sum is 32.

The square root of 1010191397 is about 31783.5082550684. The cubic root of 1010191397 is about 1003.3856567256.

The spelling of 1010191397 in words is "one billion, ten million, one hundred ninety-one thousand, three hundred ninety-seven".