30172999 has 2 divisors, whose sum is σ = 30173000. Its totient is φ = 30172998.

The previous prime is 30172973. The next prime is 30173009. The reversal of 30172999 is 99927103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30172999 - 2¹¹ = 30170951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30172199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15086499 + 15086500.

It is an arithmetic number, because the mean of its divisors is an integer number (15086500).

Almost surely, 2^30172999 is an apocalyptic number.

30172999 is a deficient number, since it is larger than the sum of its proper divisors (1).

30172999 is an equidigital number, since it uses as much as digits as its factorization.

30172999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 30172999 is about 5492.9954487511. The cubic root of 30172999 is about 311.3193818542.

The spelling of 30172999 in words is "thirty million, one hundred seventy-two thousand, nine hundred ninety-nine".