919138601 has 4 divisors (see below), whose sum is σ = 919843152. Its totient is φ = 918434052.

The previous prime is 919138589. The next prime is 919138603. The reversal of 919138601 is 106831919.

919138601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 919138601 - 2⁶ = 919138537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919138603) 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, 350315 + ... + 352928.

It is an arithmetic number, because the mean of its divisors is an integer number (229960788).

Almost surely, 2^919138601 is an apocalyptic number.

It is an amenable number.

919138601 is a deficient number, since it is larger than the sum of its proper divisors (704551).

919138601 is a wasteful number, since it uses less digits than its factorization.

919138601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704550.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 919138601 is about 30317.2987088230. The cubic root of 919138601 is about 972.2851854027.

The spelling of 919138601 in words is "nine hundred nineteen million, one hundred thirty-eight thousand, six hundred one".