70431523 has 2 divisors, whose sum is σ = 70431524. Its totient is φ = 70431522.

The previous prime is 70431511. The next prime is 70431551. The reversal of 70431523 is 32513407.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70431523 - 2²⁵ = 36877091 is a prime.

It is not a weakly prime, because it can be changed into another prime (70431553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35215761 + 35215762.

It is an arithmetic number, because the mean of its divisors is an integer number (35215762).

Almost surely, 2^70431523 is an apocalyptic number.

70431523 is a deficient number, since it is larger than the sum of its proper divisors (1).

70431523 is an equidigital number, since it uses as much as digits as its factorization.

70431523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 70431523 is about 8392.3490751994. The cubic root of 70431523 is about 412.9736668462.

The spelling of 70431523 in words is "seventy million, four hundred thirty-one thousand, five hundred twenty-three".