156998099 has 2 divisors, whose sum is σ = 156998100. Its totient is φ = 156998098.

The previous prime is 156998081. The next prime is 156998119. The reversal of 156998099 is 990899651.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156998099 is a prime.

It is a super-2 number, since 2×156998099² = 49296806179227602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156998029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78499049 + 78499050.

It is an arithmetic number, because the mean of its divisors is an integer number (78499050).

Almost surely, 2^156998099 is an apocalyptic number.

156998099 is a deficient number, since it is larger than the sum of its proper divisors (1).

156998099 is an equidigital number, since it uses as much as digits as its factorization.

156998099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 56.

The square root of 156998099 is about 12529.8882277537. Note that the first 3 decimals coincide. The cubic root of 156998099 is about 539.4668938546.

The spelling of 156998099 in words is "one hundred fifty-six million, nine hundred ninety-eight thousand, ninety-nine".