30098991 has 8 divisors (see below), whose sum is σ = 43219120. Its totient is φ = 18522432.

The previous prime is 30098989. The next prime is 30099001. The reversal of 30098991 is 19989003.

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

It is not a de Polignac number, because 30098991 - 2¹ = 30098989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 771769 = 30098991 / (3 + 0 + 0 + 9 + 8 + 9 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30098951) 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, 385846 + ... + 385923.

It is an arithmetic number, because the mean of its divisors is an integer number (5402390).

Almost surely, 2^30098991 is an apocalyptic number.

30098991 is a deficient number, since it is larger than the sum of its proper divisors (13120129).

30098991 is a wasteful number, since it uses less digits than its factorization.

30098991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771785.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 30098991 is about 5486.2547334224. The cubic root of 30098991 is about 311.0646398795.

The spelling of 30098991 in words is "thirty million, ninety-eight thousand, nine hundred ninety-one".