91420047874 has 8 divisors (see below), whose sum is σ = 137131359948. Its totient is φ = 45709594560.

The previous prime is 91420047871. The next prime is 91420047899. The reversal of 91420047874 is 47874002419.

It can be written as a sum of positive squares in 2 ways, for example, as 91389522249 + 30525625 = 302307^2 + 5525^2 .

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

It is not an unprimeable number, because it can be changed into a prime (91420047871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273214 + ... + 507430.

Almost surely, 2^91420047874 is an apocalyptic number.

91420047874 is a deficient number, since it is larger than the sum of its proper divisors (45711312074).

91420047874 is a wasteful number, since it uses less digits than its factorization.

91420047874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429380.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 91420047874 in words is "ninety-one billion, four hundred twenty million, forty-seven thousand, eight hundred seventy-four".