70735891 has 2 divisors, whose sum is σ = 70735892. Its totient is φ = 70735890.

The previous prime is 70735871. The next prime is 70735919. The reversal of 70735891 is 19853707.

It is a weak prime.

It is an emirp because it is prime and its reverse (19853707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70735891 - 2⁵ = 70735859 is a prime.

It is not a weakly prime, because it can be changed into another prime (70735871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35367945 + 35367946.

It is an arithmetic number, because the mean of its divisors is an integer number (35367946).

Almost surely, 2^70735891 is an apocalyptic number.

70735891 is a deficient number, since it is larger than the sum of its proper divisors (1).

70735891 is an equidigital number, since it uses as much as digits as its factorization.

70735891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 70735891 is about 8410.4631858180. The cubic root of 70735891 is about 413.5676969678.

The spelling of 70735891 in words is "seventy million, seven hundred thirty-five thousand, eight hundred ninety-one".