74723213 has 2 divisors, whose sum is σ = 74723214. Its totient is φ = 74723212.

The previous prime is 74723191. The next prime is 74723249. The reversal of 74723213 is 31232747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71944324 + 2778889 = 8482^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 74723213 - 2⁶ = 74723149 is a prime.

It is a super-2 number, since 2×74723213² = 11167117122086738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74723263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37361606 + 37361607.

It is an arithmetic number, because the mean of its divisors is an integer number (37361607).

Almost surely, 2^74723213 is an apocalyptic number.

It is an amenable number.

74723213 is a deficient number, since it is larger than the sum of its proper divisors (1).

74723213 is an equidigital number, since it uses as much as digits as its factorization.

74723213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 29.

The square root of 74723213 is about 8644.2589618775. The cubic root of 74723213 is about 421.1969127159.

The spelling of 74723213 in words is "seventy-four million, seven hundred twenty-three thousand, two hundred thirteen".