70713121 has 2 divisors, whose sum is σ = 70713122. Its totient is φ = 70713120.

The previous prime is 70713103. The next prime is 70713127. The reversal of 70713121 is 12131707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 18584721 = 7220^2 + 4311^2 .

It is a cyclic number.

It is not a de Polignac number, because 70713121 - 2¹⁵ = 70680353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70713092 and 70713101.

It is not a weakly prime, because it can be changed into another prime (70713127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35356560 + 35356561.

It is an arithmetic number, because the mean of its divisors is an integer number (35356561).

Almost surely, 2^70713121 is an apocalyptic number.

It is an amenable number.

70713121 is a deficient number, since it is larger than the sum of its proper divisors (1).

70713121 is an equidigital number, since it uses as much as digits as its factorization.

70713121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 70713121 is about 8409.1094058765. The cubic root of 70713121 is about 413.5233161641.

Adding to 70713121 its reverse (12131707), we get a palindrome (82844828).

The spelling of 70713121 in words is "seventy million, seven hundred thirteen thousand, one hundred twenty-one".