70432081 has 2 divisors, whose sum is σ = 70432082. Its totient is φ = 70432080.

The previous prime is 70432073. The next prime is 70432099. The reversal of 70432081 is 18023407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 140625 = 8384^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 70432081 - 2³ = 70432073 is a prime.

It is a super-2 number, since 2×70432081² = 9921356067981122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70432181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35216040 + 35216041.

It is an arithmetic number, because the mean of its divisors is an integer number (35216041).

Almost surely, 2^70432081 is an apocalyptic number.

It is an amenable number.

70432081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70432081 is an equidigital number, since it uses as much as digits as its factorization.

70432081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 70432081 is about 8392.3823196992. The cubic root of 70432081 is about 412.9747574501.

Adding to 70432081 its reverse (18023407), we get a palindrome (88455488).

The spelling of 70432081 in words is "seventy million, four hundred thirty-two thousand, eighty-one".