61691349 has 8 divisors (see below), whose sum is σ = 82385632. Its totient is φ = 41062320.

The previous prime is 61691299. The next prime is 61691363. The reversal of 61691349 is 94319616.

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

It is not a de Polignac number, because 61691349 - 2¹² = 61687253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61692349) 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, 14062 + ... + 17919.

It is an arithmetic number, because the mean of its divisors is an integer number (10298204).

Almost surely, 2^61691349 is an apocalyptic number.

It is an amenable number.

61691349 is a deficient number, since it is larger than the sum of its proper divisors (20694283).

61691349 is a wasteful number, since it uses less digits than its factorization.

61691349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32627.

The product of its digits is 34992, while the sum is 39.

The square root of 61691349 is about 7854.3840624202. The cubic root of 61691349 is about 395.1312900108.

The spelling of 61691349 in words is "sixty-one million, six hundred ninety-one thousand, three hundred forty-nine".