99978059 has 2 divisors, whose sum is σ = 99978060. Its totient is φ = 99978058.

The previous prime is 99978041. The next prime is 99978077. The reversal of 99978059 is 95087999.

It is a balanced prime because it is at equal distance from previous prime (99978041) and next prime (99978077).

It is a cyclic number.

It is not a de Polignac number, because 99978059 - 2¹⁶ = 99912523 is a prime.

It is a super-2 number, since 2×99978059² = 19991224562814962, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99977995 and 99978013.

It is not a weakly prime, because it can be changed into another prime (99978029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49989029 + 49989030.

It is an arithmetic number, because the mean of its divisors is an integer number (49989030).

Almost surely, 2^99978059 is an apocalyptic number.

99978059 is a deficient number, since it is larger than the sum of its proper divisors (1).

99978059 is an equidigital number, since it uses as much as digits as its factorization.

99978059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 99978059 is about 9998.9028898175. The cubic root of 99978059 is about 464.1249338447.

The spelling of 99978059 in words is "ninety-nine million, nine hundred seventy-eight thousand, fifty-nine".