139910811 has 4 divisors (see below), whose sum is σ = 186547752. Its totient is φ = 93273872.

The previous prime is 139910791. The next prime is 139910821. The reversal of 139910811 is 118019931.

It is a happy number.

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 139910811 - 2¹⁸ = 139648667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139910821) 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, 23318466 + ... + 23318471.

It is an arithmetic number, because the mean of its divisors is an integer number (46636938).

Almost surely, 2^139910811 is an apocalyptic number.

139910811 is a deficient number, since it is larger than the sum of its proper divisors (46636941).

139910811 is an equidigital number, since it uses as much as digits as its factorization.

139910811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46636940.

The product of its (nonzero) digits is 1944, while the sum is 33.

The square root of 139910811 is about 11828.3900426051. The cubic root of 139910811 is about 519.1391216766.

The spelling of 139910811 in words is "one hundred thirty-nine million, nine hundred ten thousand, eight hundred eleven".