787450394 has 4 divisors (see below), whose sum is σ = 1181175594. Its totient is φ = 393725196.

The previous prime is 787450393. The next prime is 787450399. The reversal of 787450394 is 493054787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493054787 = 131 ⋅3763777.

It can be written as a sum of positive squares in only one way, i.e., 777684769 + 9765625 = 27887^2 + 3125^2 .

It is not an unprimeable number, because it can be changed into a prime (787450393) 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, 196862597 + ... + 196862600.

Almost surely, 2^787450394 is an apocalyptic number.

787450394 is a deficient number, since it is larger than the sum of its proper divisors (393725200).

787450394 is a wasteful number, since it uses less digits than its factorization.

787450394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393725199.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 787450394 is about 28061.5465361409. The cubic root of 787450394 is about 923.4379847526.

The spelling of 787450394 in words is "seven hundred eighty-seven million, four hundred fifty thousand, three hundred ninety-four".