99901541 has 2 divisors, whose sum is σ = 99901542. Its totient is φ = 99901540.

The previous prime is 99901507. The next prime is 99901553. The reversal of 99901541 is 14510999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97436641 + 2464900 = 9871^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 99901541 - 2¹⁴ = 99885157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99901495 and 99901504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99907541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49950770 + 49950771.

It is an arithmetic number, because the mean of its divisors is an integer number (49950771).

Almost surely, 2^99901541 is an apocalyptic number.

It is an amenable number.

99901541 is a deficient number, since it is larger than the sum of its proper divisors (1).

99901541 is an equidigital number, since it uses as much as digits as its factorization.

99901541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 99901541 is about 9995.0758376312. The cubic root of 99901541 is about 464.0064979396.

The spelling of 99901541 in words is "ninety-nine million, nine hundred one thousand, five hundred forty-one".