99142679 has 2 divisors, whose sum is σ = 99142680. Its totient is φ = 99142678.

The previous prime is 99142643. The next prime is 99142717. The reversal of 99142679 is 97624199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99142679 - 2¹² = 99138583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99142609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571339 + 49571340.

It is an arithmetic number, because the mean of its divisors is an integer number (49571340).

Almost surely, 2^99142679 is an apocalyptic number.

99142679 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142679 is an equidigital number, since it uses as much as digits as its factorization.

99142679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 99142679 is about 9957.0416791334. The cubic root of 99142679 is about 462.8286307157.

The spelling of 99142679 in words is "ninety-nine million, one hundred forty-two thousand, six hundred seventy-nine".