138402001407 has 4 divisors (see below), whose sum is σ = 184536001880. Its totient is φ = 92268000936.

The previous prime is 138402001391. The next prime is 138402001433. The reversal of 138402001407 is 704100204831.

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

It is not a de Polignac number, because 138402001407 - 2⁴ = 138402001391 is a prime.

It is a super-3 number, since 3×138402001407³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138402001307) 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, 23067000232 + ... + 23067000237.

It is an arithmetic number, because the mean of its divisors is an integer number (46134000470).

Almost surely, 2^138402001407 is an apocalyptic number.

138402001407 is a deficient number, since it is larger than the sum of its proper divisors (46134000473).

138402001407 is an equidigital number, since it uses as much as digits as its factorization.

138402001407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46134000472.

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 138402001407 in words is "one hundred thirty-eight billion, four hundred two million, one thousand, four hundred seven".