77421374 has 4 divisors (see below), whose sum is σ = 116132064. Its totient is φ = 38710686.

The previous prime is 77421317. The next prime is 77421389. The reversal of 77421374 is 47312477.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47312477 = 449 ⋅105373.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19355342 + ... + 19355345.

It is an arithmetic number, because the mean of its divisors is an integer number (29033016).

Almost surely, 2^77421374 is an apocalyptic number.

77421374 is a deficient number, since it is larger than the sum of its proper divisors (38710690).

77421374 is a wasteful number, since it uses less digits than its factorization.

77421374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38710689.

The product of its digits is 32928, while the sum is 35.

The square root of 77421374 is about 8798.9416409020. The cubic root of 77421374 is about 426.2067185724.

The spelling of 77421374 in words is "seventy-seven million, four hundred twenty-one thousand, three hundred seventy-four".