74642951 has 2 divisors, whose sum is σ = 74642952. Its totient is φ = 74642950.

The previous prime is 74642929. The next prime is 74642957. The reversal of 74642951 is 15924647.

It is a strong prime.

It is an emirp because it is prime and its reverse (15924647) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74642951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74642957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37321475 + 37321476.

It is an arithmetic number, because the mean of its divisors is an integer number (37321476).

Almost surely, 2^74642951 is an apocalyptic number.

74642951 is a deficient number, since it is larger than the sum of its proper divisors (1).

74642951 is an equidigital number, since it uses as much as digits as its factorization.

74642951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 74642951 is about 8639.6152113390. The cubic root of 74642951 is about 421.0460527780.

The spelling of 74642951 in words is "seventy-four million, six hundred forty-two thousand, nine hundred fifty-one".