138452011 has 4 divisors (see below), whose sum is σ = 138548752. Its totient is φ = 138355272.

The previous prime is 138452009. The next prime is 138452021. The reversal of 138452011 is 110254831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110254831 = 3967 ⋅27793.

It is a cyclic number.

It is not a de Polignac number, because 138452011 - 2¹ = 138452009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138452021) 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, 46191 + ... + 49096.

It is an arithmetic number, because the mean of its divisors is an integer number (34637188).

Almost surely, 2^138452011 is an apocalyptic number.

138452011 is a deficient number, since it is larger than the sum of its proper divisors (96741).

138452011 is an equidigital number, since it uses as much as digits as its factorization.

138452011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96740.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 138452011 is about 11766.5632620574. The cubic root of 138452011 is about 517.3285215263.

The spelling of 138452011 in words is "one hundred thirty-eight million, four hundred fifty-two thousand, eleven".