70820961 has 16 divisors (see below), whose sum is σ = 100430400. Its totient is φ = 44264448.

The previous prime is 70820927. The next prime is 70820969. The reversal of 70820961 is 16902807.

It is not a de Polignac number, because 70820961 - 2¹⁰ = 70819937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70820969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876 + ... + 11933.

It is an arithmetic number, because the mean of its divisors is an integer number (6276900).

Almost surely, 2^70820961 is an apocalyptic number.

It is an amenable number.

70820961 is a deficient number, since it is larger than the sum of its proper divisors (29609439).

70820961 is a wasteful number, since it uses less digits than its factorization.

70820961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12928.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 70820961 is about 8415.5190570754. The cubic root of 70820961 is about 413.7334219344.

The spelling of 70820961 in words is "seventy million, eight hundred twenty thousand, nine hundred sixty-one".