101539381 has 2 divisors, whose sum is σ = 101539382. Its totient is φ = 101539380.

The previous prime is 101539349. The next prime is 101539387. The reversal of 101539381 is 183935101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 29866225 = 8466^2 + 5465^2 .

It is a cyclic number.

It is not a de Polignac number, because 101539381 - 2⁵ = 101539349 is a prime.

It is a super-2 number, since 2×101539381² = 20620491787726322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101539387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50769690 + 50769691.

It is an arithmetic number, because the mean of its divisors is an integer number (50769691).

Almost surely, 2^101539381 is an apocalyptic number.

It is an amenable number.

101539381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101539381 is an equidigital number, since it uses as much as digits as its factorization.

101539381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 101539381 is about 10076.6750964790. The cubic root of 101539381 is about 466.5284901000.

The spelling of 101539381 in words is "one hundred one million, five hundred thirty-nine thousand, three hundred eighty-one".