74253631 has 2 divisors, whose sum is σ = 74253632. Its totient is φ = 74253630.

The previous prime is 74253617. The next prime is 74253667. The reversal of 74253631 is 13635247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74253631 - 2⁹ = 74253119 is a prime.

It is a super-2 number, since 2×74253631² = 11027203433368322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74253593 and 74253602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74253031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37126815 + 37126816.

It is an arithmetic number, because the mean of its divisors is an integer number (37126816).

Almost surely, 2^74253631 is an apocalyptic number.

74253631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74253631 is an equidigital number, since it uses as much as digits as its factorization.

74253631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 74253631 is about 8617.0546592209. The cubic root of 74253631 is about 420.3127508030.

Adding to 74253631 its reverse (13635247), we get a palindrome (87888878).

The spelling of 74253631 in words is "seventy-four million, two hundred fifty-three thousand, six hundred thirty-one".