61390706 has 16 divisors (see below), whose sum is σ = 105003864. Its totient is φ = 26667264.

The previous prime is 61390699. The next prime is 61390717. The reversal of 61390706 is 60709316.

It can be written as a sum of positive squares in 4 ways, for example, as 48177481 + 13213225 = 6941^2 + 3635^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69005 + ... + 69888.

Almost surely, 2^61390706 is an apocalyptic number.

61390706 is a deficient number, since it is larger than the sum of its proper divisors (43613158).

61390706 is a wasteful number, since it uses less digits than its factorization.

61390706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138925.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 61390706 is about 7835.2221410755. Note that the first 3 decimals coincide. The cubic root of 61390706 is about 394.4883746145.

It can be divided in two parts, 613 and 90706, that added together give a palindrome (91319).

The spelling of 61390706 in words is "sixty-one million, three hundred ninety thousand, seven hundred six".