70249997 has 2 divisors, whose sum is σ = 70249998. Its totient is φ = 70249996.

The previous prime is 70249961. The next prime is 70250023. The reversal of 70249997 is 79994207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 8836 = 8381^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 70249997 - 2⁸ = 70249741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70249957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35124998 + 35124999.

It is an arithmetic number, because the mean of its divisors is an integer number (35124999).

Almost surely, 2^70249997 is an apocalyptic number.

It is an amenable number.

70249997 is a deficient number, since it is larger than the sum of its proper divisors (1).

70249997 is an equidigital number, since it uses as much as digits as its factorization.

70249997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 70249997 is about 8381.5271281551. The cubic root of 70249997 is about 412.6185703834.

The spelling of 70249997 in words is "seventy million, two hundred forty-nine thousand, nine hundred ninety-seven".