7392991 has 2 divisors, whose sum is σ = 7392992. Its totient is φ = 7392990.

The previous prime is 7392967. The next prime is 7393003. The reversal of 7392991 is 1992937.

It is a strong prime.

It is an emirp because it is prime and its reverse (1992937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7392991 - 2¹³ = 7384799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7392191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3696495 + 3696496.

It is an arithmetic number, because the mean of its divisors is an integer number (3696496).

Almost surely, 2^7392991 is an apocalyptic number.

7392991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7392991 is an equidigital number, since it uses as much as digits as its factorization.

7392991 is an odious number, because the sum of its binary digits is odd.

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

The square root of 7392991 is about 2719.0055167285. The cubic root of 7392991 is about 194.8079722587.

The spelling of 7392991 in words is "seven million, three hundred ninety-two thousand, nine hundred ninety-one".