70836989 has 4 divisors (see below), whose sum is σ = 70884156. Its totient is φ = 70789824.

The previous prime is 70836973. The next prime is 70837001. The reversal of 70836989 is 98963807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98963807 = 457 ⋅216551.

It can be written as a sum of positive squares in 2 ways, for example, as 4169764 + 66667225 = 2042^2 + 8165^2 .

It is a cyclic number.

It is not a de Polignac number, because 70836989 - 2⁴ = 70836973 is a prime.

It is a super-2 number, since 2×70836989² = 10035758021172242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70836919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21254 + ... + 24359.

It is an arithmetic number, because the mean of its divisors is an integer number (17721039).

Almost surely, 2^70836989 is an apocalyptic number.

It is an amenable number.

70836989 is a deficient number, since it is larger than the sum of its proper divisors (47167).

70836989 is a wasteful number, since it uses less digits than its factorization.

70836989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47166.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 70836989 is about 8416.4712914618. The cubic root of 70836989 is about 413.7646312402.

The spelling of 70836989 in words is "seventy million, eight hundred thirty-six thousand, nine hundred eighty-nine".