139948901 has 2 divisors, whose sum is σ = 139948902. Its totient is φ = 139948900.

The previous prime is 139948871. The next prime is 139948931. The reversal of 139948901 is 109849931.

It is a Cunningham number, because it is equal to 11830²+1.

It is a balanced prime because it is at equal distance from previous prime (139948871) and next prime (139948931).

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 1 = 11830^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139948901 is a prime.

It is a super-2 number, since 2×139948901² = 39171389782215602, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139948931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69974450 + 69974451.

It is an arithmetic number, because the mean of its divisors is an integer number (69974451).

Almost surely, 2^139948901 is an apocalyptic number.

It is an amenable number.

139948901 is a deficient number, since it is larger than the sum of its proper divisors (1).

139948901 is an equidigital number, since it uses as much as digits as its factorization.

139948901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 139948901 is about 11830.0000422654. Note that the first 4 decimals coincide. The cubic root of 139948901 is about 519.1862283889.

The spelling of 139948901 in words is "one hundred thirty-nine million, nine hundred forty-eight thousand, nine hundred one".