74272631 has 2 divisors, whose sum is σ = 74272632. Its totient is φ = 74272630.

The previous prime is 74272591. The next prime is 74272637. The reversal of 74272631 is 13627247.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74272631 is a prime.

It is a super-2 number, since 2×74272631² = 11032847431324322, which contains 22 as substring.

It is equal to p_4354187 and since 74272631 and 4354187 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74272637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37136315 + 37136316.

It is an arithmetic number, because the mean of its divisors is an integer number (37136316).

Almost surely, 2^74272631 is an apocalyptic number.

74272631 is a deficient number, since it is larger than the sum of its proper divisors (1).

74272631 is an equidigital number, since it uses as much as digits as its factorization.

74272631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 32.

The square root of 74272631 is about 8618.1570535701. The cubic root of 74272631 is about 420.3485975852.

Adding to 74272631 its reverse (13627247), we get a palindrome (87899878).

The spelling of 74272631 in words is "seventy-four million, two hundred seventy-two thousand, six hundred thirty-one".