99770147 has 2 divisors, whose sum is σ = 99770148. Its totient is φ = 99770146.

The previous prime is 99770141. The next prime is 99770149. The reversal of 99770147 is 74107799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99770147 - 2¹⁰ = 99769123 is a prime.

Together with 99770149, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5748938 and since 99770147 and 5748938 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 99770098 and 99770107.

It is not a weakly prime, because it can be changed into another prime (99770141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49885073 + 49885074.

It is an arithmetic number, because the mean of its divisors is an integer number (49885074).

Almost surely, 2^99770147 is an apocalyptic number.

99770147 is a deficient number, since it is larger than the sum of its proper divisors (1).

99770147 is an equidigital number, since it uses as much as digits as its factorization.

99770147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 99770147 is about 9988.5007383491. The cubic root of 99770147 is about 463.8029828331.

The spelling of 99770147 in words is "ninety-nine million, seven hundred seventy thousand, one hundred forty-seven".