30621401 has 2 divisors, whose sum is σ = 30621402. Its totient is φ = 30621400.

The previous prime is 30621389. The next prime is 30621457. The reversal of 30621401 is 10412603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 6375625 = 4924^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 30621401 - 2⁶ = 30621337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30621401.

It is not a weakly prime, because it can be changed into another prime (30621601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15310700 + 15310701.

It is an arithmetic number, because the mean of its divisors is an integer number (15310701).

Almost surely, 2^30621401 is an apocalyptic number.

It is an amenable number.

30621401 is a deficient number, since it is larger than the sum of its proper divisors (1).

30621401 is an equidigital number, since it uses as much as digits as its factorization.

30621401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 30621401 is about 5533.6607232464. The cubic root of 30621401 is about 312.8539809605.

The spelling of 30621401 in words is "thirty million, six hundred twenty-one thousand, four hundred one".