101858381 has 2 divisors, whose sum is σ = 101858382. Its totient is φ = 101858380.

The previous prime is 101858377. The next prime is 101858389. The reversal of 101858381 is 183858101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100681156 + 1177225 = 10034^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 101858381 - 2² = 101858377 is a prime.

It is a super-2 number, since 2×101858381² = 20750259559882322, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101858389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50929190 + 50929191.

It is an arithmetic number, because the mean of its divisors is an integer number (50929191).

Almost surely, 2^101858381 is an apocalyptic number.

It is an amenable number.

101858381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101858381 is an equidigital number, since it uses as much as digits as its factorization.

101858381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 35.

The square root of 101858381 is about 10092.4913178065. The cubic root of 101858381 is about 467.0165339487.

The spelling of 101858381 in words is "one hundred one million, eight hundred fifty-eight thousand, three hundred eighty-one".