74021653 has 2 divisors, whose sum is σ = 74021654. Its totient is φ = 74021652.

The previous prime is 74021617. The next prime is 74021669. The reversal of 74021653 is 35612047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73582084 + 439569 = 8578^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 74021653 - 2⁹ = 74021141 is a prime.

It is a super-2 number, since 2×74021653² = 10958410225704818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74021603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37010826 + 37010827.

It is an arithmetic number, because the mean of its divisors is an integer number (37010827).

Almost surely, 2^74021653 is an apocalyptic number.

It is an amenable number.

74021653 is a deficient number, since it is larger than the sum of its proper divisors (1).

74021653 is an equidigital number, since it uses as much as digits as its factorization.

74021653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 74021653 is about 8603.5837300511. The cubic root of 74021653 is about 419.8745902971.

The spelling of 74021653 in words is "seventy-four million, twenty-one thousand, six hundred fifty-three".