70973887 has 2 divisors, whose sum is σ = 70973888. Its totient is φ = 70973886.

The previous prime is 70973869. The next prime is 70973923. The reversal of 70973887 is 78837907.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70973887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70973887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70973857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35486943 + 35486944.

It is an arithmetic number, because the mean of its divisors is an integer number (35486944).

Almost surely, 2^70973887 is an apocalyptic number.

70973887 is a deficient number, since it is larger than the sum of its proper divisors (1).

70973887 is an equidigital number, since it uses as much as digits as its factorization.

70973887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 70973887 is about 8424.6001092040. The cubic root of 70973887 is about 414.0310038471.

The spelling of 70973887 in words is "seventy million, nine hundred seventy-three thousand, eight hundred eighty-seven".