74977945 has 8 divisors (see below), whose sum is σ = 102826944. Its totient is φ = 51413424.

The previous prime is 74977943. The next prime is 74977979. The reversal of 74977945 is 54977947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74977945 - 2¹ = 74977943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74977892 and 74977901.

It is not an unprimeable number, because it can be changed into a prime (74977943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071079 + ... + 1071148.

It is an arithmetic number, because the mean of its divisors is an integer number (12853368).

Almost surely, 2^74977945 is an apocalyptic number.

It is an amenable number.

74977945 is a deficient number, since it is larger than the sum of its proper divisors (27848999).

74977945 is a wasteful number, since it uses less digits than its factorization.

74977945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142239.

The product of its digits is 2222640, while the sum is 52.

The square root of 74977945 is about 8658.9805981998. The cubic root of 74977945 is about 421.6749910261.

The spelling of 74977945 in words is "seventy-four million, nine hundred seventy-seven thousand, nine hundred forty-five".