61939069 has 16 divisors (see below), whose sum is σ = 69713280. Its totient is φ = 54743040.

The previous prime is 61939067. The next prime is 61939079. The reversal of 61939069 is 96093916.

It is a cyclic number.

It is not a de Polignac number, because 61939069 - 2¹ = 61939067 is a prime.

It is a super-2 number, since 2×61939069² = 7672896537173522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61939061) 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, 16189 + ... + 19645.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080).

Almost surely, 2^61939069 is an apocalyptic number.

It is an amenable number.

61939069 is a deficient number, since it is larger than the sum of its proper divisors (7774211).

61939069 is a wasteful number, since it uses less digits than its factorization.

61939069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 61939069 is about 7870.1378005725. The cubic root of 61939069 is about 395.6594634751.

The spelling of 61939069 in words is "sixty-one million, nine hundred thirty-nine thousand, sixty-nine".