74397977 has 4 divisors (see below), whose sum is σ = 78313680. Its totient is φ = 70482276.

The previous prime is 74397937. The next prime is 74398003. The reversal of 74397977 is 77979347.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77979347 = 29 ⋅2688943.

It is a cyclic number.

It is not a de Polignac number, because 74397977 - 2⁸ = 74397721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74397937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957823 + ... + 1957860.

It is an arithmetic number, because the mean of its divisors is an integer number (19578420).

Almost surely, 2^74397977 is an apocalyptic number.

It is an amenable number.

74397977 is a deficient number, since it is larger than the sum of its proper divisors (3915703).

74397977 is a wasteful number, since it uses less digits than its factorization.

74397977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915702.

The product of its digits is 2333772, while the sum is 53.

The square root of 74397977 is about 8625.4261923687. The cubic root of 74397977 is about 420.5849314012.

The spelling of 74397977 in words is "seventy-four million, three hundred ninety-seven thousand, nine hundred seventy-seven".