70287023657 has 2 divisors, whose sum is σ = 70287023658. Its totient is φ = 70287023656.

The previous prime is 70287023647. The next prime is 70287023669. The reversal of 70287023657 is 75632078207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67286284816 + 3000738841 = 259396^2 + 54779^2 .

It is a cyclic number.

It is not a de Polignac number, because 70287023657 - 2²⁴ = 70270246441 is a prime.

It is not a weakly prime, because it can be changed into another prime (70287023647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35143511828 + 35143511829.

It is an arithmetic number, because the mean of its divisors is an integer number (35143511829).

Almost surely, 2^70287023657 is an apocalyptic number.

It is an amenable number.

70287023657 is a deficient number, since it is larger than the sum of its proper divisors (1).

70287023657 is an equidigital number, since it uses as much as digits as its factorization.

70287023657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 70287023657 in words is "seventy billion, two hundred eighty-seven million, twenty-three thousand, six hundred fifty-seven".