70921027 has 2 divisors, whose sum is σ = 70921028. Its totient is φ = 70921026.

The previous prime is 70921007. The next prime is 70921057. The reversal of 70921027 is 72012907.

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-70921027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70920986 and 70921004.

It is not a weakly prime, because it can be changed into another prime (70921007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35460513 + 35460514.

It is an arithmetic number, because the mean of its divisors is an integer number (35460514).

Almost surely, 2^70921027 is an apocalyptic number.

70921027 is a deficient number, since it is larger than the sum of its proper divisors (1).

70921027 is an equidigital number, since it uses as much as digits as its factorization.

70921027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 70921027 is about 8421.4622839505. The cubic root of 70921027 is about 413.9281908483.

It can be divided in two parts, 709 and 21027, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 70921027 in words is "seventy million, nine hundred twenty-one thousand, twenty-seven".