100391263 has 4 divisors (see below), whose sum is σ = 114732880. Its totient is φ = 86049648.

The previous prime is 100391261. The next prime is 100391281. The reversal of 100391263 is 362193001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100391263 - 2¹ = 100391261 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 (100391261) 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, 7170798 + ... + 7170811.

It is an arithmetic number, because the mean of its divisors is an integer number (28683220).

Almost surely, 2^100391263 is an apocalyptic number.

100391263 is a deficient number, since it is larger than the sum of its proper divisors (14341617).

100391263 is an equidigital number, since it uses as much as digits as its factorization.

100391263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14341616.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 100391263 is about 10019.5440515025. The cubic root of 100391263 is about 464.7634562128.

The spelling of 100391263 in words is "one hundred million, three hundred ninety-one thousand, two hundred sixty-three".