70874257 has 2 divisors, whose sum is σ = 70874258. Its totient is φ = 70874256.

The previous prime is 70874249. The next prime is 70874263. The reversal of 70874257 is 75247807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 21818241 = 7004^2 + 4671^2 .

It is a cyclic number.

It is not a de Polignac number, because 70874257 - 2³ = 70874249 is a prime.

It is not a weakly prime, because it can be changed into another prime (70874357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35437128 + 35437129.

It is an arithmetic number, because the mean of its divisors is an integer number (35437129).

Almost surely, 2^70874257 is an apocalyptic number.

It is an amenable number.

70874257 is a deficient number, since it is larger than the sum of its proper divisors (1).

70874257 is an equidigital number, since it uses as much as digits as its factorization.

70874257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 70874257 is about 8418.6849923251. The cubic root of 70874257 is about 413.8371803282.

The spelling of 70874257 in words is "seventy million, eight hundred seventy-four thousand, two hundred fifty-seven".