770340397 has 4 divisors (see below), whose sum is σ = 815654556. Its totient is φ = 725026240.

The previous prime is 770340383. The next prime is 770340437. The reversal of 770340397 is 793043077.

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: 793043077 = 29 ⋅27346313.

It can be written as a sum of positive squares in 2 ways, for example, as 545969956 + 224370441 = 23366^2 + 14979^2 .

It is a cyclic number.

It is not a de Polignac number, because 770340397 - 2¹⁹ = 769816109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770340377) 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, 22657054 + ... + 22657087.

It is an arithmetic number, because the mean of its divisors is an integer number (203913639).

Almost surely, 2^770340397 is an apocalyptic number.

It is an amenable number.

770340397 is a deficient number, since it is larger than the sum of its proper divisors (45314159).

770340397 is a wasteful number, since it uses less digits than its factorization.

770340397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45314158.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 770340397 is about 27755.0067014944. The cubic root of 770340397 is about 916.7006888236.

The spelling of 770340397 in words is "seven hundred seventy million, three hundred forty thousand, three hundred ninety-seven".