29970421 has 8 divisors (see below), whose sum is σ = 32376344. Its totient is φ = 27578880.

The previous prime is 29970419. The next prime is 29970431. The reversal of 29970421 is 12407992.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 28622500 = 1161^2 + 5350^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 29970421 - 2¹ = 29970419 is a prime.

It is a super-2 number, since 2×29970421² = 1796452269834482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29970431) 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, 961 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (4047043).

Almost surely, 2^29970421 is an apocalyptic number.

It is an amenable number.

29970421 is a deficient number, since it is larger than the sum of its proper divisors (2405923).

29970421 is a wasteful number, since it uses less digits than its factorization.

29970421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 29970421 is about 5474.5247282298. The cubic root of 29970421 is about 310.6210960918.

The spelling of 29970421 in words is "twenty-nine million, nine hundred seventy thousand, four hundred twenty-one".