30487997 has 4 divisors (see below), whose sum is σ = 30503616. Its totient is φ = 30472380.

The previous prime is 30487991. The next prime is 30487999. The reversal of 30487997 is 79978403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79978403 = 6299 ⋅12697.

It is a cyclic number.

It is not a de Polignac number, because 30487997 - 2¹⁴ = 30471613 is a prime.

It is a super-2 number, since 2×30487997² = 1859035922144018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30487991) 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, 4379 + ... + 8952.

It is an arithmetic number, because the mean of its divisors is an integer number (7625904).

Almost surely, 2^30487997 is an apocalyptic number.

It is an amenable number.

30487997 is a deficient number, since it is larger than the sum of its proper divisors (15619).

30487997 is a wasteful number, since it uses less digits than its factorization.

30487997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 30487997 is about 5521.5937010975. The cubic root of 30487997 is about 312.3989971185.

The spelling of 30487997 in words is "thirty million, four hundred eighty-seven thousand, nine hundred ninety-seven".