99870541 has 2 divisors, whose sum is σ = 99870542. Its totient is φ = 99870540.

The previous prime is 99870523. The next prime is 99870559. The reversal of 99870541 is 14507899.

It is a balanced prime because it is at equal distance from previous prime (99870523) and next prime (99870559).

It can be written as a sum of positive squares in only one way, i.e., 58461316 + 41409225 = 7646^2 + 6435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99870541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99870571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49935270 + 49935271.

It is an arithmetic number, because the mean of its divisors is an integer number (49935271).

Almost surely, 2^99870541 is an apocalyptic number.

It is an amenable number.

99870541 is a deficient number, since it is larger than the sum of its proper divisors (1).

99870541 is an equidigital number, since it uses as much as digits as its factorization.

99870541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 99870541 is about 9993.5249536888. The cubic root of 99870541 is about 463.9584983813.

The spelling of 99870541 in words is "ninety-nine million, eight hundred seventy thousand, five hundred forty-one".