70737281 has 2 divisors, whose sum is σ = 70737282. Its totient is φ = 70737280.

The previous prime is 70737263. The next prime is 70737301. The reversal of 70737281 is 18273707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 12138256 = 7655^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 70737281 - 2¹⁰ = 70736257 is a prime.

It is a super-2 number, since 2×70737281² = 10007525846545922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70737211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35368640 + 35368641.

It is an arithmetic number, because the mean of its divisors is an integer number (35368641).

Almost surely, 2^70737281 is an apocalyptic number.

It is an amenable number.

70737281 is a deficient number, since it is larger than the sum of its proper divisors (1).

70737281 is an equidigital number, since it uses as much as digits as its factorization.

70737281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 70737281 is about 8410.5458205755. The cubic root of 70737281 is about 413.5704058959.

The spelling of 70737281 in words is "seventy million, seven hundred thirty-seven thousand, two hundred eighty-one".