7454299921 has 2 divisors, whose sum is σ = 7454299922. Its totient is φ = 7454299920.

The previous prime is 7454299903. The next prime is 7454299987. The reversal of 7454299921 is 1299924547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5973589521 + 1480710400 = 77289^2 + 38480^2 .

It is an emirp because it is prime and its reverse (1299924547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7454299921 - 2⁵ = 7454299889 is a prime.

It is not a weakly prime, because it can be changed into another prime (7454299121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3727149960 + 3727149961.

It is an arithmetic number, because the mean of its divisors is an integer number (3727149961).

Almost surely, 2^7454299921 is an apocalyptic number.

It is an amenable number.

7454299921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7454299921 is an equidigital number, since it uses as much as digits as its factorization.

7454299921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 7454299921 is about 86338.2876886031. The cubic root of 7454299921 is about 1953.4499454320.

The spelling of 7454299921 in words is "seven billion, four hundred fifty-four million, two hundred ninety-nine thousand, nine hundred twenty-one".