9138623401 has 4 divisors (see below), whose sum is σ = 9619603600. Its totient is φ = 8657643204.

The previous prime is 9138623399. The next prime is 9138623443. The reversal of 9138623401 is 1043268319.

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 an emirpimes, since its reverse is a distinct semiprime: 1043268319 = 113 ⋅9232463.

It is a cyclic number.

It is not a de Polignac number, because 9138623401 - 2¹ = 9138623399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9138623471) 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, 240490071 + ... + 240490108.

It is an arithmetic number, because the mean of its divisors is an integer number (2404900900).

Almost surely, 2^9138623401 is an apocalyptic number.

It is an amenable number.

9138623401 is a deficient number, since it is larger than the sum of its proper divisors (480980199).

9138623401 is a wasteful number, since it uses less digits than its factorization.

9138623401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480980198.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 9138623401 is about 95596.1474171423. The cubic root of 9138623401 is about 2090.7090228879.

The spelling of 9138623401 in words is "nine billion, one hundred thirty-eight million, six hundred twenty-three thousand, four hundred one".