70450657 has 4 divisors (see below), whose sum is σ = 72880020. Its totient is φ = 68021296.

The previous prime is 70450637. The next prime is 70450687. The reversal of 70450657 is 75605407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75605407 = 29 ⋅2607083.

It can be written as a sum of positive squares in 2 ways, for example, as 33593616 + 36857041 = 5796^2 + 6071^2 .

It is a cyclic number.

It is not a de Polignac number, because 70450657 - 2¹⁵ = 70417889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70450607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214638 + ... + 1214695.

It is an arithmetic number, because the mean of its divisors is an integer number (18220005).

Almost surely, 2^70450657 is an apocalyptic number.

It is an amenable number.

70450657 is a deficient number, since it is larger than the sum of its proper divisors (2429363).

70450657 is a wasteful number, since it uses less digits than its factorization.

70450657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429362.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 70450657 is about 8393.4889646678. The cubic root of 70450657 is about 413.0110607211.

The spelling of 70450657 in words is "seventy million, four hundred fifty thousand, six hundred fifty-seven".