70711987 has 2 divisors, whose sum is σ = 70711988. Its totient is φ = 70711986.

The previous prime is 70711969. The next prime is 70711999. The reversal of 70711987 is 78911707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70711987 - 2⁷ = 70711859 is a prime.

It is not a weakly prime, because it can be changed into another prime (70711967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35355993 + 35355994.

It is an arithmetic number, because the mean of its divisors is an integer number (35355994).

Almost surely, 2^70711987 is an apocalyptic number.

70711987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70711987 is an equidigital number, since it uses as much as digits as its factorization.

70711987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 70711987 is about 8409.0419787274. The cubic root of 70711987 is about 413.5211056458.

The spelling of 70711987 in words is "seventy million, seven hundred eleven thousand, nine hundred eighty-seven".