61219691 has 8 divisors (see below), whose sum is σ = 69399120. Its totient is φ = 53536032.

The previous prime is 61219687. The next prime is 61219733. The reversal of 61219691 is 19691216.

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

It is a cyclic number.

It is not a de Polignac number, because 61219691 - 2² = 61219687 is a prime.

It is a super-2 number, since 2×61219691² = 7495701132270962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61219621) 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, 123680 + ... + 124173.

It is an arithmetic number, because the mean of its divisors is an integer number (8674890).

Almost surely, 2^61219691 is an apocalyptic number.

61219691 is a deficient number, since it is larger than the sum of its proper divisors (8179429).

61219691 is a wasteful number, since it uses less digits than its factorization.

61219691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247885.

The product of its digits is 5832, while the sum is 35.

The square root of 61219691 is about 7824.3013106603. The cubic root of 61219691 is about 394.1217275284.

The spelling of 61219691 in words is "sixty-one million, two hundred nineteen thousand, six hundred ninety-one".