70921801 has 2 divisors, whose sum is σ = 70921802. Its totient is φ = 70921800.

The previous prime is 70921793. The next prime is 70921817. The reversal of 70921801 is 10812907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36288576 + 34633225 = 6024^2 + 5885^2 .

It is a cyclic number.

It is not a de Polignac number, because 70921801 - 2³ = 70921793 is a prime.

It is equal to p_4169044 and since 70921801 and 4169044 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70921801.

It is not a weakly prime, because it can be changed into another prime (70921861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35460900 + 35460901.

It is an arithmetic number, because the mean of its divisors is an integer number (35460901).

Almost surely, 2^70921801 is an apocalyptic number.

It is an amenable number.

70921801 is a deficient number, since it is larger than the sum of its proper divisors (1).

70921801 is an equidigital number, since it uses as much as digits as its factorization.

70921801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 70921801 is about 8421.5082378396. The cubic root of 70921801 is about 413.9296966512.

The spelling of 70921801 in words is "seventy million, nine hundred twenty-one thousand, eight hundred one".