91649303421 has 8 divisors (see below), whose sum is σ = 131598999840. Its totient is φ = 56399571312.

The previous prime is 91649303419. The next prime is 91649303423. The reversal of 91649303421 is 12430394619.

It is an interprime number because it is at equal distance from previous prime (91649303419) and next prime (91649303423).

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

It is not a de Polignac number, because 91649303421 - 2¹ = 91649303419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91649303423) 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, 1174991031 + ... + 1174991108.

It is an arithmetic number, because the mean of its divisors is an integer number (16449874980).

Almost surely, 2^91649303421 is an apocalyptic number.

It is an amenable number.

91649303421 is a deficient number, since it is larger than the sum of its proper divisors (39949696419).

91649303421 is a wasteful number, since it uses less digits than its factorization.

91649303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349982155.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 91649303421 in words is "ninety-one billion, six hundred forty-nine million, three hundred three thousand, four hundred twenty-one".