61420091 has 8 divisors (see below), whose sum is σ = 63277200. Its totient is φ = 59580160.

The previous prime is 61420081. The next prime is 61420123. The reversal of 61420091 is 19002416.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61420091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61420001) 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, 3155 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (7909650).

Almost surely, 2^61420091 is an apocalyptic number.

61420091 is a deficient number, since it is larger than the sum of its proper divisors (1857109).

61420091 is a wasteful number, since it uses less digits than its factorization.

61420091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 61420091 is about 7837.0971028819. The cubic root of 61420091 is about 394.5513059202.

The spelling of 61420091 in words is "sixty-one million, four hundred twenty thousand, ninety-one".