70997767 has 2 divisors, whose sum is σ = 70997768. Its totient is φ = 70997766.

The previous prime is 70997761. The next prime is 70997789. The reversal of 70997767 is 76779907.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70997767 - 2¹¹ = 70995719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70997761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35498883 + 35498884.

It is an arithmetic number, because the mean of its divisors is an integer number (35498884).

Almost surely, 2^70997767 is an apocalyptic number.

70997767 is a deficient number, since it is larger than the sum of its proper divisors (1).

70997767 is an equidigital number, since it uses as much as digits as its factorization.

70997767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166886, while the sum is 52.

The square root of 70997767 is about 8426.0172679624. The cubic root of 70997767 is about 414.0774338423.

The spelling of 70997767 in words is "seventy million, nine hundred ninety-seven thousand, seven hundred sixty-seven".