30649897 has 4 divisors (see below), whose sum is σ = 31706820. Its totient is φ = 29592976.

The previous prime is 30649889. The next prime is 30649901. The reversal of 30649897 is 79894603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16353936 + 14295961 = 4044^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 30649897 - 2³ = 30649889 is a prime.

It is a super-2 number, since 2×30649897² = 1878832372221218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30649807) 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, 528418 + ... + 528475.

It is an arithmetic number, because the mean of its divisors is an integer number (7926705).

Almost surely, 2^30649897 is an apocalyptic number.

It is an amenable number.

30649897 is a deficient number, since it is larger than the sum of its proper divisors (1056923).

30649897 is a wasteful number, since it uses less digits than its factorization.

30649897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056922.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 30649897 is about 5536.2349119234. The cubic root of 30649897 is about 312.9509972383.

The spelling of 30649897 in words is "thirty million, six hundred forty-nine thousand, eight hundred ninety-seven".