61062991 has 8 divisors (see below), whose sum is σ = 66700368. Its totient is φ = 55440000.

The previous prime is 61062973. The next prime is 61063001. The reversal of 61062991 is 19926016.

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

It is not a de Polignac number, because 61062991 - 2⁷ = 61062863 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 (61062931) 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, 6541 + ... + 12841.

It is an arithmetic number, because the mean of its divisors is an integer number (8337546).

Almost surely, 2^61062991 is an apocalyptic number.

61062991 is a deficient number, since it is larger than the sum of its proper divisors (5637377).

61062991 is a wasteful number, since it uses less digits than its factorization.

61062991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7193.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 61062991 is about 7814.2812209441. The cubic root of 61062991 is about 393.7851710919.

The spelling of 61062991 in words is "sixty-one million, sixty-two thousand, nine hundred ninety-one".