70491823 has 2 divisors, whose sum is σ = 70491824. Its totient is φ = 70491822.

The previous prime is 70491787. The next prime is 70491829. The reversal of 70491823 is 32819407.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70491823 - 2¹⁷ = 70360751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70491829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35245911 + 35245912.

It is an arithmetic number, because the mean of its divisors is an integer number (35245912).

Almost surely, 2^70491823 is an apocalyptic number.

70491823 is a deficient number, since it is larger than the sum of its proper divisors (1).

70491823 is an equidigital number, since it uses as much as digits as its factorization.

70491823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 70491823 is about 8395.9408644892. The cubic root of 70491823 is about 413.0914891305.

The spelling of 70491823 in words is "seventy million, four hundred ninety-one thousand, eight hundred twenty-three".