70929961 has 2 divisors, whose sum is σ = 70929962. Its totient is φ = 70929960.

The previous prime is 70929941. The next prime is 70929997. The reversal of 70929961 is 16992907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 28419561 = 6520^2 + 5331^2 .

It is an emirp because it is prime and its reverse (16992907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70929961 - 2⁹ = 70929449 is a prime.

It is not a weakly prime, because it can be changed into another prime (70929941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35464980 + 35464981.

It is an arithmetic number, because the mean of its divisors is an integer number (35464981).

Almost surely, 2^70929961 is an apocalyptic number.

It is an amenable number.

70929961 is a deficient number, since it is larger than the sum of its proper divisors (1).

70929961 is an equidigital number, since it uses as much as digits as its factorization.

70929961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 70929961 is about 8421.9926976933. The cubic root of 70929961 is about 413.9455711155.

The spelling of 70929961 in words is "seventy million, nine hundred twenty-nine thousand, nine hundred sixty-one".