85078907 has 2 divisors, whose sum is σ = 85078908. Its totient is φ = 85078906.

The previous prime is 85078891. The next prime is 85078921. The reversal of 85078907 is 70987058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85078907 - 2⁴ = 85078891 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_4947992 and since 85078907 and 4947992 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85078937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42539453 + 42539454.

It is an arithmetic number, because the mean of its divisors is an integer number (42539454).

Almost surely, 2^85078907 is an apocalyptic number.

85078907 is a deficient number, since it is larger than the sum of its proper divisors (1).

85078907 is an equidigital number, since it uses as much as digits as its factorization.

85078907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 85078907 is about 9223.8227975173. The cubic root of 85078907 is about 439.8189802892.

The spelling of 85078907 in words is "eighty-five million, seventy-eight thousand, nine hundred seven".