70245731 has 2 divisors, whose sum is σ = 70245732. Its totient is φ = 70245730.

The previous prime is 70245701. The next prime is 70245733. The reversal of 70245731 is 13754207.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70245731 - 2¹⁴ = 70229347 is a prime.

It is a super-2 number, since 2×70245731² = 9868925447448722, which contains 22 as substring.

Together with 70245733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70245694 and 70245703.

It is not a weakly prime, because it can be changed into another prime (70245733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35122865 + 35122866.

It is an arithmetic number, because the mean of its divisors is an integer number (35122866).

Almost surely, 2^70245731 is an apocalyptic number.

70245731 is a deficient number, since it is larger than the sum of its proper divisors (1).

70245731 is an equidigital number, since it uses as much as digits as its factorization.

70245731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 70245731 is about 8381.2726360619. The cubic root of 70245731 is about 412.6102179918.

Adding to 70245731 its reverse (13754207), we get a palindrome (83999938).

The spelling of 70245731 in words is "seventy million, two hundred forty-five thousand, seven hundred thirty-one".