61901439 has 8 divisors (see below), whose sum is σ = 82828032. Its totient is φ = 41121240.

The previous prime is 61901429. The next prime is 61901447. The reversal of 61901439 is 93410916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61901439 - 2¹¹ = 61899391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35607 + ... + 37304.

It is an arithmetic number, because the mean of its divisors is an integer number (10353504).

Almost surely, 2^61901439 is an apocalyptic number.

61901439 is a deficient number, since it is larger than the sum of its proper divisors (20926593).

61901439 is a wasteful number, since it uses less digits than its factorization.

61901439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73197.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 61901439 is about 7867.7467549483. The cubic root of 61901439 is about 395.5793219102.

The spelling of 61901439 in words is "sixty-one million, nine hundred one thousand, four hundred thirty-nine".