70272157 has 2 divisors, whose sum is σ = 70272158. Its totient is φ = 70272156.

The previous prime is 70272151. The next prime is 70272161. The reversal of 70272157 is 75127207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70207641 + 64516 = 8379^2 + 254^2 .

It is an emirp because it is prime and its reverse (75127207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70272157 - 2³ = 70272149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70272151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35136078 + 35136079.

It is an arithmetic number, because the mean of its divisors is an integer number (35136079).

Almost surely, 2^70272157 is an apocalyptic number.

It is an amenable number.

70272157 is a deficient number, since it is larger than the sum of its proper divisors (1).

70272157 is an equidigital number, since it uses as much as digits as its factorization.

70272157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 70272157 is about 8382.8489787184. The cubic root of 70272157 is about 412.6619519570.

The spelling of 70272157 in words is "seventy million, two hundred seventy-two thousand, one hundred fifty-seven".