70905161 has 2 divisors, whose sum is σ = 70905162. Its totient is φ = 70905160.

The previous prime is 70905101. The next prime is 70905179. The reversal of 70905161 is 16150907.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70879561 + 25600 = 8419^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 70905161 - 2¹⁰ = 70904137 is a prime.

It is not a weakly prime, because it can be changed into another prime (70905101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35452580 + 35452581.

It is an arithmetic number, because the mean of its divisors is an integer number (35452581).

Almost surely, 2^70905161 is an apocalyptic number.

It is an amenable number.

70905161 is a deficient number, since it is larger than the sum of its proper divisors (1).

70905161 is an equidigital number, since it uses as much as digits as its factorization.

70905161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 70905161 is about 8420.5202333348. The cubic root of 70905161 is about 413.8973214210.

The spelling of 70905161 in words is "seventy million, nine hundred five thousand, one hundred sixty-one".