70428961 has 2 divisors, whose sum is σ = 70428962. Its totient is φ = 70428960.

The previous prime is 70428959. The next prime is 70428973. The reversal of 70428961 is 16982407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 22043025 = 6956^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 70428961 - 2¹ = 70428959 is a prime.

It is a super-3 number, since 3×70428961³ (a number of 25 digits) contains 333 as substring.

Together with 70428959, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 70428961.

It is not a weakly prime, because it can be changed into another prime (70423961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35214480 + 35214481.

It is an arithmetic number, because the mean of its divisors is an integer number (35214481).

Almost surely, 2^70428961 is an apocalyptic number.

It is an amenable number.

70428961 is a deficient number, since it is larger than the sum of its proper divisors (1).

70428961 is an equidigital number, since it uses as much as digits as its factorization.

70428961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 70428961 is about 8392.1964347839. The cubic root of 70428961 is about 412.9686593755.

The spelling of 70428961 in words is "seventy million, four hundred twenty-eight thousand, nine hundred sixty-one".